<ARTICLE>        5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS FOR REPLIGEN CORPORATION AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>            0000730272
<NAME>           REPLIGEN CORPORATION
<MULTIPLIER>     1
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          MAR-31-1996
<PERIOD-START>                             APR-01-1995
<PERIOD-END>                               JUN-30-1995
<CASH>                                       7,588,041
<SECURITIES>                                 4,012,263
<RECEIVABLES>                                2,187,739
<ALLOWANCES>                                 (300,000)
<INVENTORY>                                  1,520,943
<CURRENT-ASSETS>                            16,020,923
<PP&E>                                      20,312,117
<DEPRECIATION>                              15,738,139
<TOTAL-ASSETS>                              22,103,079
<CURRENT-LIABILITIES>                        8,944,920
<BONDS>                                              0
<COMMON>                                             0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                    153,589
<OTHER-SE>                                  13,004,570
<TOTAL-LIABILITY-AND-EQUITY>                22,103,079
<SALES>                                        392,091
<TOTAL-REVENUES>                             2,836,316
<CGS>                                          290,147
<TOTAL-COSTS>                                4,068,182
<OTHER-EXPENSES>                             1,406,754
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                            (2,638,620)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (2,638,620)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (2,638,620)
<EPS-PRIMARY>                                   (0.17)
<EPS-DILUTED>                                   (0.17)