Fig. 4.

Apparent relative permeabilities under bi-ionic conditions. Permeability ratios (P_A/P_Cl) were calculated from reversal potentials (E_rev) obtained from the experiments in Fig. 2 using the Goldman-Hodgkin-Katz equation (Eq. 2). Vertical bars represent means and error bars represent SE. Relative permeabilities for SCN⁻ and ClO₄⁻ were not significantly different; for all other comparisons, P < 0.001 (two-tailed t-test). Gluconate (Gluc⁻), n = 9; Br⁻, n = 8; I⁻, n = 8; $N{O}_3^{-}$, n = 20; ClO₄⁻, n = 9; SCN⁻_, n = 8.