Amine N-methyltransferase
（重定向自INMT）
In enzymology, an amine N-methyltransferase (EC2.1.1.49) is an enzyme that is ubiquitously present in non-neural tissues and that catalyzes the N-methylation of tryptamine and structurally related compounds.
The chemical reaction taking place is:
Thus, the two substrates of this enzyme are S-adenosyl methionine and amine, whereas its two products are S-adenosylhomocysteine and methylated amine. In the case of tryptamine and serotonin these then become the dimethylated indolethylamines dimethyltryptamine (DMT) and bufotenine.