Figure 5From: Polygonum viviparum L. induces vasorelaxation in the rat thoracic aorta via activation of nitric oxide synthase in endothelial cells The flow chart of endothelium-dependent mediator of vasorelaxation by PVin rat thoracic. PV increase vessel diameter in an endotheliumdependent manner by stimulating production of nitric oxide. cGMP (cyclic guanosine monophosphate); GC (guanylyl cyclase); GTP (guanosine triphosphate); NO (nitric oxide); NOS (nitric oxide synthase).Back to article page