Health / Medical Topics

    Tryptophan

    Definition 1

    The least plentiful of all 22 amino acids and an essential amino acid in humans (provided by food), Tryptophan is found in most proteins and a precursor of serotonin. Tryptophan is converted to 5-hydroxy-tryptophan (5-HTP), converted in turn to serotonin, a neurotransmitter essential in regulating appetite, sleep, mood, and pain. Tryptophan is a natural sedative and present in dairy products, meats, brown rice, fish, and soybeans. (NCI Thesaurus)

    Definition 2

    Amino acid with side chain -CH2C8H6N. (NCI Thesaurus/CRCH)




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