Indolamine N-Acetyltransferase; utilizes arylalkylamine substrates including 5‐methoxytryptamine, tryptamine and serotonin, metabolites involved in metatonin biosynthesis; possible role in zinc homeostasis; Bdf1p-dependent transcription induced by salt stress; green fluorescent protein (GFP)-fusion protein localizes to both the cytoplasm and the nucleus