Common use of Series Clause in Contracts

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 Certificates as of the Issue Date: $39,259,000 Denomination: $39,259,000 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 Certificates in REMIC II created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 M-1 Certificates as of the Issue Date: $39,259,000 46,469,000 Denomination: $39,259,000 46,469,000 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 HP 4 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 M-1 Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 M-1 Certificates in REMIC II created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 M-1 Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 M-1 Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 M-1 Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 P Certificates as of the Issue Date: $39,259,000 100.00 Denomination: $39,259,000 100.00 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. UBS Securities LLC is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 P Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 P Certificates in REMIC II IV created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 P Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 P Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 P Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate shall be made unless the transfer is made pursuant to an effective registration statement under the Securities Act of 1933, as amended (the “1933 Act”), and an effective registration or qualification under applicable state securities laws, or is made in a transaction that does not require such registration or qualification. In the event that such a transfer of this Certificate is to be made without registration or qualification, the Trustee shall require receipt of (i) if such transfer is purportedly being made in reliance upon Rule 144A under the 1933 Act, written certifications from the Holder of the Certificate desiring to effect the transfer, and from such Holder’s prospective transferee, substantially in the forms attached to the Agreement as Exhibit F-1, and (ii) in all other cases, an Opinion of Counsel satisfactory to it that such transfer may be made without such registration or qualification (which Opinion of Counsel shall not be an expense of the Trust Fund or of the Depositor, the Trustee or the Master Servicer in their respective capacities as such), together with copies of the written certification(s) of the Holder of the Certificate desiring to effect the transfer and/or such Holder’s prospective transferee upon which such Opinion of Counsel is based. None of the Depositor or the Trustee is obligated to register or qualify the Class of Certificates specified on the face hereof under the 1933 Act or any other securities law or to take any action not otherwise required under the Agreement to permit the transfer of such Certificates without registration or qualification. Any Holder desiring to effect a transfer of this Certificate shall be required to indemnify the Trustee, the Depositor and the Master Servicer against any liability that may result if the transfer is not so exempt or is not made in accordance with such federal and state laws. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 M-7 Certificates as of the Issue Date: $39,259,000 18,427,000 Denomination: $39,259,000 18,427,000 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 HV 1 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 M-7 Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 M-7 Certificates in REMIC II created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 M-7 Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 M-7 Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 M-7 Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 M-8 Certificates as of the Issue Date: $39,259,000 14,422,000 Denomination: $39,259,000 14,422,000 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 HW 9 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 M-8 Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 M-8 Certificates in REMIC II created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 M-8 Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 M-8 Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 M-8 Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 M-10 Certificates as of the Issue Date: $39,259,000 8,012,000 Denomination: $39,259,000 8,012,000 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 HY 5 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 M-10 Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 M-10 Certificates in REMIC II created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 M-10 Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 M-10 Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 M-10 Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 M-5 Certificates as of the Issue Date: $39,259,000 13,620,000 Denomination: $39,259,000 13,620,000 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 HT 6 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 M-5 Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 M-5 Certificates in REMIC II created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 M-5 Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 M-5 Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 M-5 Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.

Series. 2005-OPT1 Pass-Through Rate: Variable Cut-off Date and date of Pooling and Servicing Agreement: May 1, 2005 First Distribution Date: June 27, 2005 No. 1 Aggregate Certificate Principal Balance of the Class M-4 M-2 Certificates as of the Issue Date: $39,259,000 37,656,000 Denomination: $39,259,000 37,656,000 Master Servicer: Option One Mortgage Corporation Trustee: Xxxxx Fargo Bank, N.A. Issue Date: May 12, 2005 CUSIP: 57643L HS 8 HQ 2 DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE. MORTGAGE PASS-THROUGH CERTIFICATE evidencing a beneficial ownership interest in a portion of a Trust Fund (the “Trust Fund”) consisting primarily of a pool of conventional one- to four-family, fixed-rate and adjustable-rate, first and second lien mortgage loans (the “Mortgage Loans”) formed and sold by MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC., THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES. This certifies that Cede & Co. is the registered owner of a Percentage Interest (obtained by dividing the denomination of this Certificate by the aggregate Certificate Principal Balance of the Class M-4 M-2 Certificates as of the Issue Date) in that certain beneficial ownership interest evidenced by all the Class M-4 M-2 Certificates in REMIC II created pursuant to a Pooling and Servicing Agreement, dated as specified above (the “Agreement”), among Mortgage Asset Securitization Transactions, Inc. (hereinafter called the “Depositor,” which term includes any successor entity under the Agreement), the Master Servicer and the Trustee, a summary of certain of the pertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, distributions will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (a “Distribution Date”), commencing on the First Distribution Date specified above, to the Person in whose name this Certificate is registered on the Record Date, in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to the Holders of Class M-4 M-2 Certificates on such Distribution Date pursuant to the Agreement. All distributions to the Holder of this Certificate under the Agreement will be made or caused to be made by the Trustee by wire transfer in immediately available funds to the account of the Person entitled thereto if such Person shall have so notified the Trustee in writing at least five Business Days prior to the Record Date immediately prior to such Distribution Date and is the registered owner of Class M-4 M-2 Certificates the aggregate initial Certificate Principal Balance of which is in excess of the lesser of (i) $5,000,000 or (ii) two-thirds of the aggregate initial Certificate Principal Balance of the Class M-4 M-2 Certificates, or otherwise by check mailed by first class mail to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice by the Trustee of the pendency of such distribution and only upon presentation and surrender of this Certificate at the office or agency appointed by the Trustee for that purpose as provided in the Agreement. The Pass-Through Rate applicable to the calculation of interest payable with respect to this Certificate on any Distribution Date shall equal a rate per annum equal to the lesser of (i) the related Formula Rate for such Distribution Date and (ii) the related Net WAC Pass-Through Rate for such Distribution Date. This Certificate is one of a duly authorized issue of Certificates designated as Mortgage Pass-Through Certificates of the Series specified on the face hereof (herein called the “Certificates”) and representing a Percentage Interest in the Class of Certificates specified on the face hereof equal to the denomination specified on the face hereof divided by the aggregate Certificate Principal Balance of the Class of Certificates specified on the face hereof. The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Collection Account and the Distribution Account may be made from time to time for purposes other than distributions to Certificateholders, such purposes including reimbursement of advances made, or certain expenses incurred, with respect to the Mortgage Loans. The Agreement permits, with certain exceptions therein provided, the amendment thereof and the modification of the rights and obligations of the Depositor, the Master Servicer, the Trustee, the Trustee and the rights of the Certificateholders under the Agreement at any time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates entitled to at least 66% of the Voting Rights. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future Holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon this Certificate. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the Holders of any of the Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee as provided in the Agreement, duly endorsed by, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee duly executed by, the Holder hereof or such Holder’s attorney duly authorized in writing, and thereupon one or more new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest will be issued to the designated transferee or transferees. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any Person using “Plan Assets” to acquire this Certificate shall be made except in accordance with Section 5.02(c) of the Agreement. The Certificates are issuable in fully registered form only without coupons in Classes and denominations representing Percentage Interests specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, the Certificates are exchangeable for new Certificates of the same Class in authorized denominations evidencing the same aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange of Certificates, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of Certificates. The Depositor, the Master Servicer, the Trustee and any agent of the Depositor, the Master Servicer or the Trustee may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes, and none of the Depositor, the Master Servicer, the Trustee nor any such agent shall be affected by notice to the contrary. The obligations created by the Agreement and the Trust Fund created thereby shall terminate upon payment to the Certificateholders of all amounts held by the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the final payment or other liquidation (or any advance with respect thereto) of the last Mortgage Loan and REO Property remaining in REMIC I and (ii) the purchase by the party designated in the Agreement at a price determined as provided in the Agreement from REMIC I of all the Mortgage Loans and all property acquired in respect of such Mortgage Loans. The Agreement permits, but does not require, the party designated in the Agreement to purchase from REMIC I all the Mortgage Loans and all property acquired in respect of any Mortgage Loan at a price determined as provided in the Agreement. The exercise of such right will effect early retirement of the Certificates; however, such right to purchase is subject to the aggregate Stated Principal Balance of the Mortgage Loans at the time of purchase being less than 10% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. The recitals contained herein shall be taken as statements of the Depositor and the Trustee assumes no responsibility for their correctness. Unless the certificate of authentication hereon has been executed by the Trustee, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose.