Exhibit 23.1
INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM’S CONSENT
We hereby consent to the incorporation by reference in the Registration Statement of Repligen Corporation on FormsS-3 (FileNos. 333-106109,333-36280,333-35056,333-31728,333-95641,333-79611,333-76005,333-57951,333-30383 and333-211436) and FormsS-8 (File Nos.333-196456,333-184284,333-181670,333-157168 and333-89140) of our report dated March 1, 2017, with respect to our audit of the financial statements of TangenX Technology Corporation as of December 31, 2015 and for the year ended, which report is included in this Form8-K/A of Repligen Corporation for the year ended December 31, 2015.
/s/ MarcumLLP
MarcumLLP
Boston, Massachusetts
March 1, 2017