<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ONTOGENY,
INC. AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C> <C>
<PERIOD-TYPE> 6-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JAN-01-2000 JAN-01-1999
<PERIOD-END> JUN-30-2000 JUN-30-1999
<CASH> 12,182,615 0
<SECURITIES> 20,711,167 0
<RECEIVABLES> 0 0
<ALLOWANCES> 0 0
<INVENTORY> 0 0
<CURRENT-ASSETS> 33,584,654 0
<PP&E> 8,247,595 0
<DEPRECIATION> (3,417,717) 0
<TOTAL-ASSETS> 38,853,696 0
<CURRENT-LIABILITIES> 5,646,891 0
<BONDS> 2,835,970 0
62,492,792 0
8,738,123 0
<COMMON> 39,179 0
<OTHER-SE> (40,899,259) 0
<TOTAL-LIABILITY-AND-EQUITY> (32,121,957) 0
<SALES> 0 0
<TOTAL-REVENUES> 1,497,269 2,493,841
<CGS> 18,587,502 9,294,570
<TOTAL-COSTS> 18,587,502 9,294,570
<OTHER-EXPENSES> 0 0
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 302,046 560,598
<INCOME-PRETAX> (16,255,929) (6,107,433)
<INCOME-TAX> 0 0
<INCOME-CONTINUING> (16,255,929) (6,107,433)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (16,255,929) (6,107,433)
<EPS-BASIC> (4.66) (2.44)
<EPS-DILUTED> 0 0
</TABLE>