Fig. 2.

A, Voltage-clamp current response traces from a holding potential of −60 mV to different test potentials (from −80 to 40 mV; see inset) obtained from a VRG neuron under control conditions [intracellular CsCl (110 mm) + TEA (30 mm); top panel] and after bath application of 30 mm tetraethylammonium (TEA) chloride (bottom panel). Possible remaining unblocked K⁺ currents were most obvious at the steady-state level. Therefore, current amplitudes were measured at the steady-state values (75 msec after onset of test pulse; seediamonds at top and bottom panels). B, Average current–voltage response curve from 25 VRG neurons. Filled diamonds represent current response under control conditions, and open diamonds correspond to current response after TEA application.