1. Endothelium-derived relaxing factor produced and released from artery and vein is nitric oxide.
2. The molecule of the year. Science, 258, 1861, 1992; Stamler, J.S., Singel, D.J., Loscalzo, J. Biochemistry of nitric oxide and its redox‐activated forms;Koshland D.E.;Science,1992