Table 2

Percentage change in the subsequent GABA-induced currents due to a 1-min application of 0.5 mM pCMBS in the presence of the indicated reagent2-a

Saturating GABA2-a100 nM Diazepam100 nM β-CCE100 nM Flumazenil
WT2-b −12  ± 3 (8)5  ± 5 (4)5  ± 3 (3)4  ± 4 (3)
F296C2-b −23  ± 52-150 (10)24  ± 22-150 (8)−5  ± 8 (3)5  ± 2 (3)
F298C2-b 30  ± 62-150 (9)36  ± 122-150 (6)45  ± 112-c 2-150 (3)20  ± 62-150 (6)
L301C2-b 37  ± 92-150 (8)40  ± 102-150 (5)3  ± 3 (3)52  ± 132-150 (5)
WT2-d −4  ± 2 (8)−2  ± 3 (3)3  ± 6 (3)1  ± 4 (3)
A300C2-d 45  ± 62-150 (11)4  ± 8 (3)4  ± 9 (3)10  ± 6 (3)
E303C2-d −32  ± 42-150 (20)5  ± 9 (4)12  ± 3 (3)3  ± 1 (3)

Data given as means ± S.E.M. (n).

    • 2-a  Results in the presence of saturating GABA taken from Williams and Akabas (1999).

    • 2-b  Effect on EC50 GABA test pulses.

    • 2-c  For F298C, the effect was 9 ± 3% in the presence of 10 nM β-CCE.

    • 2-d  Effect on near-saturating GABA test pulses.

    • 2-150  Statistically different than corresponding wild type by one-way ANOVA.