EXHIBIT 31.3
CERTIFICATION OF CHIEF EXECUTIVE OFFICER
PURSUANT TO RULE 13A-14(A) OR RULE 15D-14(A)
PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934
I, William D. Young, certify that:
1. I have reviewed this Amendment No. 1 to the annual report on Form 10-K/A of Monogram Biosciences, 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: April 30, 2007 |
/s/ William D. Young |
William D. Young Chief Executive Officer |