Monoamine oxidase
Substrate specificities
Serotonin, melatonin, norepinephrine, and epinephrine are mainly broken down by MAO-A. Phenethylamine and benzylamine are mainly broken down by MAO-B. Both forms break down dopamine, tyramine, and tryptamine equally. Specific reactions catalyzed by MAO include:
Monoamine oxidase-7