The pineal family of aromatic amine N‐acetyltransferases

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Abstract
The mammalian pineal gland contains two types of N‐acetyltransferases which act on aromatic amines. One type preferentially acetylates arylamines such as phenetidine and aniline, whereas the other preferentially acetylates arylalkylamines such as tryptamine and phenylethylamine. The two enzymes can be distinguished by (1) molecular size, (2) regulation, and (3) inactivation characteristics. Arylalkylamine N‐acetyltransferase is involved in the regulation of melatonin synthesis in the pineal gland. A specific function of pineal arylamine N‐acetyltransferase has not been established; it may function as a nonspecific detoxification mechanism.