FIG. 1.

Analysis of rectifying membrane currents in response to voltage-step applications from −120 to +40 mV in 14 hiN cells. (A) (Left) Example traces of large, outwardly rectifying currents present in 71% of hiN cells. (Right) Rectifying membrane currents in response to voltage-step applications are indicated by larger currents in response to stronger depolarization. (B) (Left) Example traces of small, nonrectifying membrane currents found in 29% hiN cells. (Right) Linear relationship between holding potentials and membrane currents suggests an absence of rectifying K⁺-channels.