Figure 4.

Channel conductance vs. KCl concentration. Single channel slope conductances were determined in symmetric bathing solutions of buffer A with 55, 100, 160, 300, 455, 583, and 2000 mM KCl (n = 2, 5, 4, 2, 1, 3, and 3 single channels, respectively; ≥4 V_b values for each conductance). The average conductances with SEMs are here shown against the KCl activity (KCl concentration multiplied by tabulated activity coefficients; ref. 17). Notice that channel conductance does not saturate with increasing KCl concentrations.