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1.
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I have reviewed this Annual Report on Form 10-K/A of Myrexis, Inc.; and
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2.
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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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Dated: July 26, 2013
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/s/ Jonathan M. Couchman
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Jonathan M. Couchman
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President and Chief Executive Officer
(principal executive officer)
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