<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM GENZYME
TRANSGENICS CORPORATION AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JAN-03-1999
<PERIOD-END>                               JUN-28-1998
<CASH>                                          10,691
<SECURITIES>                                         0
<RECEIVABLES>                                    7,003
<ALLOWANCES>                                       437
<INVENTORY>                                         11
<CURRENT-ASSETS>                                27,337
<PP&E>                                          37,187
<DEPRECIATION>                                   8,397
<TOTAL-ASSETS>                                  74,152
<CURRENT-LIABILITIES>                           20,106
<BONDS>                                          8,764
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           183
<OTHER-SE>                                      44,233
<TOTAL-LIABILITY-AND-EQUITY>                    74,152
<SALES>                                         28,164
<TOTAL-REVENUES>                                28,164
<CGS>                                           27,747
<TOTAL-COSTS>                                   37,557
<OTHER-EXPENSES>                                 (100)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 646
<INCOME-PRETAX>                                (9,939)
<INCOME-TAX>                                      (10)
<INCOME-CONTINUING>                            (9,929)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (11,085)
<EPS-PRIMARY>                                    (.63)
<EPS-DILUTED>                                    (.63)