Abstract
Two-dimensional thin layer chromatography has been used by workers in the field to separate radiolabeled serotonin derivatives from complex mixtures of culture media and homogenates of glands. The compounds resolved include N-acetylserotonin, melatonin, hydroxytryptophol, methoxytryptophol, hydroxyindole acetic acid, and methoxyindole acetic acid. The method requires either radiolabeled tryptophan or serotonin, if an investigator wants to study conversion. It is also useful in the chemical synthesis of serotonin metabolites because it is relatively fast. It pointed to the enzyme that converts serotonin to N-acetylserotonin as being key in controlling the nocturnal increase in vertebrate melatonin production. This enzyme, arylalkylamine N-acetyltransferase (E.C. 2.3.1.87), has been the focus of hundreds of papers which probed its biology, biochemistry, molecular biology, structural biology, neural regulation, development, evolution, and genetics.
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