AMENDMENT NO. 1 TO EMPLOYMENT AGREEMENT This AMENDMENT, dated as of February 10, 1997, is between VIROLOGIX CORPORATION, a Delaware corporation (with its successors and assigns, referred to as the "Corporation"), and Joshua D. Schein (referred to as...

                                                               EXHIBIT 10(b)(i)


                                       E-1



                                 AMENDMENT NO. 1
                                       TO
                              EMPLOYMENT AGREEMENT



      This AMENDMENT, dated as of February 10, 1997, is between VIROLOGIX
CORPORATION, a Delaware corporation (with its successors and assigns, referred
to as the "Corporation"), and Xxxxxx X. Xxxxxx (referred to as "Schein").



      The Employment Agreement between the Corporation and Schein, dated as of
January 1, 1996 (the "Agreement"), is hereby amended as follows:



            1. The first sentence of the Preliminary Statement shall be replaced
with the following sentence:



                  "Schein is now employed as an Executive Vice President of the
                  Corporation."



            2. The first sentence of Section 2 of the Agreement shall be
replaced with the following sentence:



                  "During the Term, Schein shall serve as an Executive President
                  of the Corporation."



      The Agreement shall remain the same in all other respects.



      IN WITNESS WHEREOF, the parties hereto have executed this AMENDMENT as of
the date first written above.





                              /s/ Xxxxxx X. Xxxxxx
                              __________________________________
                              Xx. Xxxxxx X. Xxxxxx




                              VIROLOGIX CORPORATION




                              By:   /s/ Xxxxxx X. Xxxxxx
                                    _____________________________
                                    Xxxxxx X. Xxxxxx, Chief Financial Officer



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