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Relaxation response to 1 μM acetylcholine or 5 mM potassium carried out in 1.5, 5.5 or 5.9 mM potassium HPSS, of endothelium intact mesenteric small arteries from male Wistar rats. Arteries were preconstricted with 10 μM phenylephrine and relaxation responses carried out in the presence of 10 μM indomethacin and 400 μM L-NAME (n=7).
