Figure 3. Lack of effect of the membrane potential on anion transport by SLC26A4.

In A and B, I⁻ influx was measured while holding the membrane potential at −100 mV or at +40 mV. In A, I⁻ influx was measured in Cl⁻-free medium at the indicated I⁻ concentrations. Efflux was measured by incubating the oocytes in standard oocyte media containing 110 mm Cl⁻. In B, I⁻ influx was measured at the indicated I⁻ concentrations while Cl⁻ was kept constant at 110 mm.