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. 2002 Aug 16;544(Pt 2):417–428. doi: 10.1113/jphysiol.2002.025171

Figure 3. Effect of 4-aminopyridine (4-AP) on antral A-type currents.

Figure 3

A and B, whole-cell A-type currents before (A) and after (B) external 4-AP (10 mm). The membrane potential was stepped for 500 ms from −80 mV to potentials between −80 and +40 mV. C, difference currents obtained by subtracting B from A at the voltage steps indicated; the dashed line marks zero current. D, average peak current density-voltage relationships before (○) and after 4-AP (•). *Significant reduction in peak current density after 4-AP as compared to control (P < 0.05; n = 6).