Table II.

Inhibition of the uptake of [¹⁴C]Glc or [¹⁴C]Suc by CCCP

Concentration of CCCP	Glc Uptake	Suc Uptake
μm	% of uninhibited uptake
0	100	100
2	34	58
5	23	41
10	15	n.d.a

Ethanolic CCCP was added 1 min before the addition of [¹⁴C]Glc or simultaneous with [¹⁴C]Suc, respectively. Incubation time was 5 min (Glc) or 15 min (Suc) at pH 5.5. The concentration of Glc and Suc was 0.5 mm; that of ethanol 0.8% (v/v), also in the controls (n = 3).

^an.d., Not determined.