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The vasorelaxant effect of WGWP in rat aortic rings preconstricted with norepinephrine. Isolated rat aortic rings without (a) or with (b, c) endothelium were preconstricted by addition of 300 nM norepinephrine (NE) and vasorelaxation was measured after treatment with WGWP ((a, b) 1 mg/mL; (c) 0.01–1.0 mg/mL). A–DMeans with different letters are significantly different (P < 0.05) by one-way analysis of variance.
