Claim: Retinal oxidase has 3 substrates of this enzyme and it belongs to the family of oxidoreductases.
Evidence: The 3 substrates of this enzyme are retinal, O2, and H2O, whereas its two products are retinoic acid and H2O2. This enzyme belongs to the family of oxidoreductases, specifically those acting on the aldehyde or oxo group of donor with oxygen as acceptor.