EXHIBIT 31.2
CERTIFICATION UNDER SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, R. Michael Carruthers, Chief Financial Officer, certify that:
| 1. | | I have reviewed this amendment no. 1 to annual report on Form 10-K/A of Array BioPharma Inc.; |
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| 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. |
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| Date: November 9, 2010 | /s/ R. Michael Carruthers | |
| | R. Michael Carruthers | |
| | Chief Financial Officer | |
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