Table I.

Voltage dependence of individual BKB channels

Channel V0.5 Millivolts per e-fold change in Poa qG (eo)b Pomax 
 mV    
DM1 22.9 13.4 1.90 0.95 
DM2 29.0 12.5 2.04 0.94 
DM3 23.0 9.1 2.80 0.94 
DM4 48.0 10.6 2.41 0.92 
Mean 30.7 ± 5.9 11.4 ± 1.0 2.29 ± 0.20 0.94 ± 0.1 
Channel V0.5 Millivolts per e-fold change in Poa qG (eo)b Pomax 
 mV    
DM1 22.9 13.4 1.90 0.95 
DM2 29.0 12.5 2.04 0.94 
DM3 23.0 9.1 2.80 0.94 
DM4 48.0 10.6 2.41 0.92 
Mean 30.7 ± 5.9 11.4 ± 1.0 2.29 ± 0.20 0.94 ± 0.1 

The means ± SEM are presented in the bottom row.

a

The voltage sensitivity is defined as the voltage change (in millivolts) required for an e-fold change in Po.

b

Effective gating charge qG = kBT/(millivolts per e-fold change in Po), where kB is Boltzmann's constant, T is absolute temperature, and kBT = 25.5 (millivolts eo) at 23°C.

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