    l-monoamine oxidases (mao) () are a family of enzymes that catalyze the oxidation of monoamines. they are found bound to the outer membrane of mitochondria in most cell types in the body. the enzyme was originally discovered by mary bernheim in the liver and was named tyramine oxidase. they belong to the protein family of flavin-containing amine oxidoreductases. == subtypes and tissue distribution == in humans there are two types of mao: mao-a and mao-b.{{cite journal | author = shih jc, chen k | title = regulation of mao-a and mao-b gene expression | jou
Amphetamine EC_1.4.3 Genes_on_chromosome_X Integral_membrane_proteins