Figure 1.

Comparing the AMFE predictions of the model (lines) to experiments (symbols). Ca²⁺ is added to the luminal bath while both baths contain 100 mM X⁺ for different monovalents X⁺: (A) Li⁺, (B) Na⁺, (C) K⁺, and (D) Cs⁺. The currents at 10, 20, and 30 mV are shown. Experimental error bars smaller than the symbol are not shown. The 20 mV curves in panels B and D were published previously (21).