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. 2020 Jun 11;295(32):11246–11261. doi: 10.1074/jbc.RA120.014055

Scheme 1.

Scheme 1.

General scheme of oxidase and monooxygenase activities catalyzed by l-amino acid oxidases. Oxidase activity results in deamination of an imino acid to form a keto acid and ammonium (blue), whereas monooxygenase activity results in decarboxylation of an imino acid to form an amide product (red). Thus, the monooxygenation catalyzed by l-amino acid oxidases is apparent monooxygenation resulting from decarboxylation—not true monooxygenase activity resulting from oxygen insertion.