Exhibit 31.1
Certification of Chief Executive Officer
Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002
Pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002
I, Russell J. Howard, certify that:
1. | I have reviewed this Amendment No. 1 to quarterly report on Form 10-Q/A of Maxygen, Inc.; and | |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: | January 9, 2009 | /s/ Russell J. Howard | ||||
Chief Executive Officer |