Table A1.

Parameter values for K_V channels A and B

Parameter	Channel A	Channel B
$\stackrel{-}{{\alpha }_X}$ (ms−1)	0.0319 ± 0.009	0.049 ± 0.035
$\stackrel{-}{{\beta }_X}$ (ms−1)	0.0142 ± 0.004	0.346 ± 0.043
$\stackrel{-}{V_X}$ (mV)	2.3 ± 1.8	5.7 ± 3.2
kαX (mV)	13.7 ± 0.9	24.2 ± 5
kβX (mV)	14.1 ± 0.9	33.9 ± 5
ΦX (ms−1)	0.007 ± 0.003	0.0105 ± 0.003
ϕX (ms−1)	1 × 10−5	0.0103 ± 0.0016
γB (ms−1)		0.0021 ± 0.0021
δB (ms−1)		1 × 10-6 ± 1.4 × 10−5
$\stackrel{-}{{\text{gK}}_{\text{V}}}$ (mS/cm2)	0.86 ± 0.4	1.92 ± 0.4
Percent contribution	0.31 ± 0.04	0.69 ± 0.06
gleak (mS/cm2)	0.1	0.1

The values correspond to mean ± SEM calculated from fits to records obtained for 80-, 100-, 120-, 140-, 160-, and 180-mV pulses from nine fibers. Note that the IC state does not exist for channel A. The rate constants α and β for channels A and B had voltage dependences given by Eqs. 2 and 4, respectively. See text for specific deviations from these values.