Differences in the deactivation kinetics of gK,n and gK,L. gK,L deactivation followed a single- or
double-exponential decay function, while gK,n
deactivation had a sigmoidal onset. A.
Steps from −64 to −124 mV (gK,n) or -69 to −129 mV (gK,L) caused deactivation of currents through both
gK,n, and gK,L ; thin
traces are for gK,n from 5 outer hair cells, thick traces are for gK,L from 5 type I cells. Currents are normalized to
the peak current at the beginning of the step. B. Fits (thick lines) to
the deactivation of two of the data traces in A (thin lines; obscured
by fits except at the step onset). The type I data were fit by a
double-exponential function [eq.(4)]: A1 = −264 pA, τ1 = 2.5 ms,
A2 = −684 pA, τ2 = 26.8 ms.
The OHC data were fit by Eq.(3): τ1 = 7.8 ms,
τ2 = 33.1 ms.