<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> 3-MOS 3-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JAN-01-2000 JAN-01-1999
<PERIOD-END> MAR-31-2000 MAR-31-1999
<CASH> 21,403,085 0
<SECURITIES> 18,228,604 0
<RECEIVABLES> 65,025 0
<ALLOWANCES> 0 0
<INVENTORY> 0 0
<CURRENT-ASSETS> 526,443 0
<PP&E> 7,840,598 0
<DEPRECIATION> (2,935,657) 0
<TOTAL-ASSETS> 45,581,827 0
<CURRENT-LIABILITIES> 6,244,318 0
<BONDS> 50,000 0
62,444,153 0
8,738,123 0
<COMMON> 37,755 0
<OTHER-SE> (34,601,800) 0
<TOTAL-LIABILITY-AND-EQUITY> 45,581,827 0
<SALES> 0 0
<TOTAL-REVENUES> 750,000 1,250,000
<CGS> 0 0
<TOTAL-COSTS> 9,406,827 4,579,225
<OTHER-EXPENSES> 0 0
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> (164,811) (297,280)
<INCOME-PRETAX> (8,244,149) (2,986,413)
<INCOME-TAX> 0 0
<INCOME-CONTINUING> (8,244,149) (2,986,413)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (8,244,149) (2,986,413)
<EPS-BASIC> (2.65) (1.23)
<EPS-DILUTED> (2.65) (1.23)
</TABLE>