Fig. 5. Currents produced by CionaKv4 and an N-terminal deleted mutant of CionaKv4 (ntCionaKv4) in the presence and absence of CionaKChIP. (A) Representative currents from CionaKv4 channels expressed alone. (B) Currents produced by CionaKv4 co-expressed with CionaKChIP. (C) Currents produced by ntCionaKv4 channels expressed alone. (D) Currents produced by ntCionaKv4 co-expressed with CionaKChIP. All recordings were obtained using the macro-patch technique. Currents were evoked by depolarizing the macro-patches for 0.5 s from a holding potential of -100 mV to +80mV in 10 mV steps. The form of the stimulus protocol is given on the