Physiology Nitric Oxide Synthase : A Is inhibited by Ca+ B Catalyzes a dioxygenase reaction C Accepts electrons from NADH D Requires NADPH, FAD, FMN & Heme iron 💡 Explanation Nitric Oxide Synthase : ✓ Correct Answer: D. Requires NADPH, FAD, FMN & Heme iron