Table 1.

IC₅₀ (M) of reversible inhibitors for 0.1 and 1 mM ATCh and BTCh

	Substrate
Inhibitor	0.1 mM ATCh	1 mM ATCh	0.1 mM BTCh	1 mM BTCh
Ethopropazine	9.3± 3.1 × 10−5	1.3± 0.5 × 10−4	9.1± 2.1 × 10−5	2.2±0.7 × 10−4
BW284c51	2.0± 0.3 × 10−5	3.2± 0.3 × 10−5	2.3± 0.3 × 10−5	8.9± 0.3 × 10−5
Donepezil	8.9± 0.6 ×10−5	6.9± 0.2 ×10−5	NDa	NDa
Edrophonium	3.1± 0.1 × 10−5	1.6±0.2 × 10−4	NDa	NDa
Tacrine	6.2± 0.6 × 10−5	1.4±0.1 × 10−4	NDa	NDa
Propidium	>3.0 × 10−4	>3.0 × 10−4	NDa	NDa

IC₅₀ values given as the mean±SE of at least 2 independent experiments (shown in Fig. 2)

^aND, not determined.