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Consent of Independent Registered Public Accounting Firm
We consent to the reference to our firm under the caption "Experts" and to the use of our report dated July 3, 2013, in the Registration Statement (Form S-1) and related Prospectus of Acceleron Pharma Inc. for the registration of shares of its common stock.
/s/ Ernst & Young LLP
Boston, Massachusetts
August 5, 2013
Consent of Independent Registered Public Accounting Firm