Figure 3. Effect of cation replacement on I_{K, vol} in Ehrlich cells.

Currents were measured in the whole-cell recording mode of the patch-clamp technique, using the same voltage protocol as described in the legend to Fig. 1. In A, a record of the current measured at E_Cl is shown. At the times indicated, all NaCl in the solution was replaced by the Cl⁻ salt of the indicated cation. In B and C, the current-voltage relations measured with the cations indicated as the main extracellular monovalent cation are shown. The composition of the solutions used is given in Table 1 (100 mM Cl⁻).