Table 1.

Dissociation constants for various peptide-metal complexes. Number in parentheses correspond to standard deviation in the last reported significant figure.

	Dissociation Constants (M)
	H-CQuin	H-EMeQuin	H-EQuin	Quin18
CoII	2 (1) × 10−9	1.2(5) × 10−8	2 (1) × 10−9	6.5 × 10−7
NiII	2 (1) × 10−11	1.1(1) × 10−9	2(1) × 10−10	1.6 × 10−7
CuII	5.2(4) × 10−14	1.4(8) × 10−13	6.3(1) × 10−14	2.3 × 10−10
ZnII	6.2(1) × 10−9	6.8(3) × 10−9	3 (1) × 10−9	8.7 × 10−7