Figure 3
From: Cellular elements for seeing in the dark: voltage-dependent conductances in cockroach photoreceptors
Reversal potential of the sustained current followed the Nernst slope for potassium. The reversal potential was measured from tail currents with varying external K+ concentrations (inset), resulting in Erev = -68 mV under the standard 5 mM concentration (n = 17 (5 mM), 6 (15 and 50 mM) or 5 (25 mM), data are mean ± SD). The fitted Nernst slope (solid line) was 52 mV/mM and the theoretical Nernst slope (dashed line) for potassium was 58 mV/mM. Theoretical E rev with 5 mM [K+]out was -84 mV.