Claim: Opine dehydrogenase is an oxidoreductase enzyme with three substrates: [[(2S)-2-[1-(R)-carboxyethyl]aminopentanoate], NAD, and H2O, and four products: L-2-aminopentanoic acid, pyruvate, NADH, and H2O.
Evidence: The 3 substrates of this enzyme are [[(2S)-2-{[1-(R)-carboxyethyl]amino}pentanoate]], NAD, and H2O, whereas its 4 products are L-2-aminopentanoic acid, pyruvate, NADH, and H.