Extended Data Figure 7. Sample traces of whole cell currents for N648A and N649A filter mutants.

The pipette solution contained 150 mM Na⁺ and the bath solution contained 150 mM Na⁺ or 145 mM K⁺/5 mM Na⁺. The tail currents were used to generate the I–V curves shown in Figure 2g. The experiments were repeated five times independently with similar results.