AKA serotonin N-acetylase; "Aralkylamine N-acetyltransferase (AANAT) (EC 2.3.1.87), also known as arylalkylamine N-acetyltransferase or serotonin N-acetyltransferase (SNAT); an enzyme that is involved in the day/night rhythmic production of melatonin, by modification of serotonin. " Source: https://en.wikipedia.org/wiki/Aralkylamine_N-acetyltransferase]