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A, currents were recorded in the presence of 1 μm ACh or 10 μm IVM at –100 mV (filled circles) and +40 mV (open circles) in the oocytes expressing Kir3.1–Kir3.2 and M2R without (left) or with (right) pretreatment by pertussis toxin (PTX). B, currents were recorded in the presence of 1 μm ACh or 10 μm IVM in the oocytes expressing the Kir3.2 L344E mutant and M2R.
