Figure 11

Effects of the small peptides on Kv currents from cerebellum Purkinje neurons. Representative experiments showing that the small peptides (200 nM) block voltage dependent K+ currents elicited by a pulse of − 60 to 30 mV during 100 ms (holding potential Vh = − 60 mV). Effects of the small peptides on K+ currents are activated by increasing voltage pulses. The K+ currents were recorded following stepwise increments of 10 mV of the membrane voltage between − 60 and 30 mV. (a) Recordings showing the response of one cell in the control group to elicited pulses, and (b) effects of kunitz4-b (200 nM). (c) The four traces of four groups are superimposed on an expanded voltage and time scale.