Figure 2.

C-type inactivation time course of inward K⁺ currents mediated by the various channel mutants studied. Representative current traces recorded from cells with the indicated channel types. Pulses applied from −80 to −10 mV. In all cases, we used K⁺-free internal solution. The external solution contained 5 mM K⁺ in all cases except in experiments with E418Q channels, which were done with 30 mM K⁺.