nitric oxide synthase

(redirected from NO synthase I)
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nitric oxide synthase

[‚nī·trik ¦äk‚sīd ¦sin‚thās]
(biochemistry)
An enzyme that catalyzes the stepwise conversion of the amino acid L-arginine to nitric oxide and L-citrulline. There are three types: the brain (or neuronal) and epithelial nitric oxide synthases, which are always present in cells, and inducible nitric oxide synthase, which is produced as needed.
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The researchers should then know all the sites where NO synthase is secreted in the penis.
Once we know exactly where NO synthase is made," says Ignarro, "I think we will be a lot closer to understanding what the possible defects [involved] in impotence may be.