Table 1. Binding Constants of CP·WP6 and CP·WP5 Complexes.

complex	K [M–1]	method of determination
trans-CP·WP5	(4.3 ± 1) × 103	absorption spectroscopy
	(2.77 ± 0.05) × 103	fluorescence spectroscopy
	(3.2 ± 0.3) × 103	NMR
(trans-CP)2·WP5	(8 ± 3) × 102	NMR
cis-CP·WP5	(1.4 ± 0.8) × 103	absorption spectroscopy
trans-CP·WP6	(1.37 ± 0.18) × 105	absorption spectroscopy
	(1.45 ± 0.07) × 105	fluorescence spectroscopy
	(1.6 ± 0.2) × 105	isothermal calorimetry
(trans-CP)2·WP6	(9.2 ± 2) × 103	isothermal calorimetry
cis-CP·WP6	(1.31 ± 0.18) × 105	absorption spectroscopy