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Effects of indomethacin, L-NOARG and apamin plus ChTX on membrane hyperpolarization induced by ACh in control (sham-operated) rat mesenteric arteries. Actual recordings of the hyperpolarizing responses to 1 μM ACh before (left panels) and after (right panels) treatment with 10 μM indomethacin (a), 100 μM L-NOARG (b) or 500 nM apamin plus 100 nM ChTX (c) are shown.
