Figure 7.

Cationic selectivity of wt SGLT1 leak current. (A) In the presence of 15 mM Na⁺, 75 mM of additional Na⁺ or Li⁺, Cs⁺, or K⁺ was added to the bath and the leak current was derived by subtracting current measured in each saline solution containing 0.2 mM Pz from current measured in the corresponding saline solution (n = 4). (B) Q/V curves associated with the leak currents of A depicting the transient charge movements related to the return to −50 mV after each voltage pulse. Mean ± SE are shown.