<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS FINANCIAL INFORMATION EXTRACTED FROM THE FINANCIAL STATEMENTS FOR REPLIGEN CORPORATION AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> MAR-31-1998 <PERIOD-END> MAR-31-1998 <CASH> 4,726 <SECURITIES> 0 <RECEIVABLES> 238 <ALLOWANCES> (25) <INVENTORY> 671 <CURRENT-ASSETS> 5,765 <PP&E> 1,254 <DEPRECIATION> (595) <TOTAL-ASSETS> 6,513 <CURRENT-LIABILITIES> 388 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 180 <OTHER-SE> 5,944 <TOTAL-LIABILITY-AND-EQUITY> 6,513 <SALES> 1,114 <TOTAL-REVENUES> 2,385 <CGS> 480 <TOTAL-COSTS> 3,181 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 0 <INCOME-TAX> 0 <INCOME-CONTINUING> 0 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (796) <EPS-PRIMARY> (.05) <EPS-DILUTED> (.05)