An enzyme that catalyzes the oxidative deamination of naturally occurring monoamines. It is a flavin-containing enzyme that is localized in mitochondrial membranes, whether in nerve terminals, the liver, or other organs. Monoamine oxidase is important in regulating the metabolic degradation of catecholamines and serotonin in neural or target tissues. Hepatic monoamine oxidase has a crucial defensive role in inactivating circulating monoamines or those, such as tyramine, that originate in the gut and are absorbed into the portal circulation. (From Goodman and Gilman's, The Pharmacological Basis of Therapeutics, 8th ed, p415) EC 1.4.3.4.

Descriptor ID	D008995
MeSH Number(s)	D08.811.682.664.750
Concept/Terms	Monoamine Oxidase Monoamine Oxidase Oxidase, Monoamine Amine Oxidase (Flavin-Containing) MAO Tyramine Oxidase Oxidase, Tyramine Type A Monoamine Oxidase Type A Monoamine Oxidase MAO-A MAO A Monoamine Oxidase A Monoamine Oxidase B Monoamine Oxidase B MAO-B MAO B Type B Monoamine Oxidase

Below are MeSH descriptors whose meaning is more general than "Monoamine Oxidase".

Below are MeSH descriptors whose meaning is related to "Monoamine Oxidase".

Below are MeSH descriptors whose meaning is more specific than "Monoamine Oxidase".