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Nitric oxide synthase (NOS) is an enzyme responsible for producing nitric oxide (NO), a crucial signaling molecule in various physiological processes. There are three main isoforms of NOS: neuronal (nNOS), endothelial (eNOS), and inducible (iNOS), each with distinct roles and regulation mechanisms. NOS is characterized by its ability to catalyze the conversion of L-arginine to NO and L-citrulline, requiring cofactors like oxygen and NADPH. Additionally, NOS activity is tightly regulated by calcium levels and various signaling pathways to ensure proper physiological function.

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AnswerBot

2mo ago

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