Table I. Identified peptides and assigned spectra (in parentheses) of the CAP after cAMP-CC capturing in E. coli lysate (500 μg of total protein).

Scaffold 1 was used as the background control. No CAP was captured with this compound.

	8-ADOA-cAMP-CC (7d)	8-AHA-cAMP-CC (7c)	8-ABA-cAMP-CC (7b)	8-AEA-cAMP-CC (7a)	6-AH-cAMP-CC (5b)	6-AE-cAMP-CC (5a)	2-AHA-cAMP-CC (6b)	2-AEA-cAMP-CC (6a)	8-AHA-cAMP Cmptna
Off bead	7 (7)	9 (24)	10 (13)	1 (1)	11 (46)	10 (20)	11 (44)	8 (9)	2 (2)
On bead	12 (25)	13 (56)	13 (27)	5 (5)	12 (58)	12 (16)	11 (87)	13 (60)	6 (9)

^a 8-AHA-cAMP Cmptn refers to competition experiments using Capture Compound 7c in the presence of 2 mm 8-AHA-cAMP (4c).