TABLE 2.

Inhibition of [¹⁴C]succinate uptake^a

Inhibitor	Inhibitor concn (mM)	Inhibition (%)
None		0
KCN	0.1	40
	1	70
	1b	>95
NaN3	0.1	30
	1	50
	1b	>95
TCS	0.01	95
	0.1	>95
	1	>95
Valinomycin	0.1	5
	0.05b	15
	0.1b	40
Nigericin	0.001	5
	0.005	30
	0.01	60
	0.05	95
	0.1	>95
Vanadate	0.1	<5
	0.1b	40
	0.5b	60
	1b	80
	5b	>95
N-Ethylmaleimide	0.1	90
	1	>95

^aThe degree of inhibition of the succinate uptake rate after 2 min of preincubation in the presence of the inhibitor was determined. 

^bValue was obtained after 15 min of preincubation in the presence of the inhibitor.