Table 2.

Parameters obtained from the fit of the CdSO₄ concentration dependence on k_AB⁽²⁾ (see Fig. 2) to Eqs. 5 and A4

RC	Kd, μM	kAB(2)(Cd2+), s−1	kAB(2)(0), s−1	kon, μM−1⋅s−1	koff, s−1
Native	≈0.3	60	ND	ND	≪10
DN(M17)	3.1	7.1	630	30	100
DN(L210)	1.2	7.5	690	90	110

ND, not determinable (in view of the Cd²⁺ concentration independence). Errors are 10% for k_AB⁽²⁾ (Cd²⁺) and k_off, 20% for K_d, k_AB⁽²⁾(0), and k_on.