Option One Mortgage Loan Trust 2007-1 Sample Contracts

OPTION ONE MORTGAGE ACCEPTANCE CORPORATION $1,709,793,000 (Approximate) Option One Mortgage Loan Trust 2007-1 Asset-Backed Certificates Series 2007-1 UNDERWRITING AGREEMENT

Underwriting Agreement • February 8th, 2007 • Option One Mortgage Loan Trust 2007-1 • Asset-backed securities • New York

• Contract Type
  Underwriting Agreement
• Filed
  February 8th, 2007
• Company
  Option One Mortgage Loan Trust 2007-1
• Industry
  Asset-backed securities
• Jurisdiction
  New York

Lehman Brothers Inc. 745 Seventh Avenue New York, New York 10019 Merrill Lynch, Pierce, Fenner & Smith Incorporated 4 World Financial Center New York, New York 10080