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The primary endogenous substrate for nitric oxide synthase is
EXPLANATION
Vasoactive Peptides & Mediators
- Biosynthesis of Endogenous Nitric Oxide (NO):
- Nitric oxide is an endothelial-derived relaxing factor (EDRF) synthesized by the family of Nitric Oxide Synthase (NOS) enzymes (eNOS, nNOS, iNOS).
- The reaction requires molecular oxygen, NADPH, and tetrahydrobiopterin ($BH_4$), using L-Arginine as the obligatory amino acid substrate:
- nalysis:
- (Arginine): Correct primary substrate.
Correct option: (4) Arginine
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