Figure 11.

Conductive properties of the ion channels that underlie the transient tail current (I_Tail). (A) Voltage pulse protocol used in all experiments. (B) Typical record showing currents recorded under standard conditions I_Tail was quantified immediately after V_m was stepped to V_Test, whilst the steady-state current (I_{Steady state}) was quantified as the mean current recorded over the final few ms of the test pulse. (C) Data subsequently recorded after 20–30 s exposure to K⁺-rich bath solution. (D) Plots showing the I_Tail–V_m relationship quantified during exposure to standard bath solution (Control) and after 20–30 s exposure to K⁺-rich bath solution (High K⁺). (E) Plots showing the I_{Steady state}–V_m relationship quantified during exposure to standard bath solution (Control) and after 20–30 s exposure to K⁺-rich bath solution (High K⁺). All data are mean ± s.e.m. (n = 5).