Figure 3. Monovalent currents through SOCs in divalent-free external solution.

A, effect of replacement of control solution with divalent-free solution on the amplitude of I_SOC. Amplitude at −118 mV is plotted against time. Horizontal bar shows time of the application of divalent-free solution. B, I–V plots of I_SOC obtained in control conditions (trace 1) and divalent-free solution (traces 2 and 3). C, current traces obtained in divalent-free solution in response to voltage steps to −118, −138, and −158 mV steps. Results shown on this figure are from a cell representative of 8 cells with similar results.