Voltage-gated sodium currents from individual GFP⁺ TK23 cells.

<p><b>A,</b> Representative example of fast-activating, fast-inactivating inward current (upper panel) evoked by depolarizing current steps (lower panel; steps range from −80 mV to +15 mV; pre-pulse to −120 mV; Vm = −60 mV). <b>B</b>, Peak current-voltage plot for the cell shown in <b>A</b>. <b>C</b>, Average (±sem) activation curve for all neurons (n = 36).