Claim: Phenylalanine dehydrogenase is an enzyme belonging to the family of oxidoreductases and has three substrates.
Evidence: In enzymology, a phenylalanine dehydrogenase (EC ) is an enzyme that catalyzes the chemical reaction This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH2 group of donors with NAD+ or NADP+ as acceptor. The 3 substrates of this enzyme are L-phenylalanine, H2O, and NAD, whereas its 4 products are phenylpyruvate, NH3, NADH, and H.