Figure 3.

Na⁺ dependence of the C292A leak current. At each extracellular Na⁺ concentration, the current in the presence of 0.2 mM Pz was subtracted from the current in saline solution (pH 7.5) to derive the leak current (n = 8). The reversal potentials of the leak currents at each [Na⁺]_o were enlarged (inset). Mean ± SE are shown.