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MELATONIN SYNTHESIS AND METABOLISM Melatonin Synthesis Melatonin (N-acetyl-5-methoxytryptamine) is synthesized within the pinealocytes from tryptophan, mostly occurring during the dark phase of the day, when there is a major increase in the activity of serotonin-N-acetyltransferase (arylalkylamine N-acetyltransferase, AA-NAT), responsible for the transformation of 5-hydroxytryptamine (5HT, serotonin) to N-acetylserotonin (NAS) (Figure 1)

Ventricular tachycardia. Medscape, Accessed November 17 2012

The two major gene products that encode tachykinins are the preprotachykinin A ( TAC1) gene the parent of Substance P (SubP) and neurokinin A (NKA), and preprotachykinin B ( TAC3 ) gene encoding the precursor of neurokinin B (NKB) [21, 69, 70]

Enzymatic and NNMT pathway research 5-Amino-1MQ is commonly studied in vitro for its interaction with enzymatic pathways, particularly those involving NNMT and metabolic regulation