Figure 6. pH dependence of I_Cl,ir.

Voltage protocol as in Fig. 5. Solutions contained 10 μm Gd³⁺. A-C, current traces in solution of pH 6 (A), pH 7 (B) and pH 8 (C). D, mean relative amplitude of I_Cl,ir at different pH. Currents measured at −130 mV were normalized to the current at pH 7. This experiment is typical of 3 cells.