TABLE 2.

Observed rate constant and apparent Na⁺ affinities for reactivation of enzyme after metal fluoride treatment in either NaF or KF

	NaF		KF
	kobs	K0.5	kobs
	10−3s−1	mm	10−3s−1
MgCl2	1.40 ± 0.03	89.0 ± 1.1a	0.300 ± 0.005
BeSO4	27.8 ± 3.1	8.1 ± 1.4	29.5 ± 1.3
AlCl3	19.3 ± 1.0	7.0 ± 1.0	2.53 ± 0.08
AlCl3·ADP	14.8 ± 1.0	0.8 ± 0.4	0.40 ± 0.07

^a The relation is clearly sigmoid with a Hill coefficient of 2.1 ± 0.1.