A, representative M536E (left), M712E (middle), and M739E (right) G–V curves before (open symbols) and after (filled symbols) treatment with Ch-T. See Table 3 for mean ±s.e.m. values; n = 5. B, M536E (left), M712E (middle), and M739E (right) scaled tail currents recorded at −200 mV after pulses to 180 mV before (thin sweep) and after (thick sweep) Ch-T modification. C, voltage dependence of the deactivation time constant for M536E (diamonds), M712E (squares), and M739E (triangles) before (open symbols) and after (filled symbols) application of Ch-T. See Table 4 for mean ±s.e.m. values.