Tryptophan: 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. (NCI04)
Source: Diseases Database
Tryptophan: essential amino acid necessary for normal growth in infants, nitrogen balance in adults; seretonin precursor.
Source: CRISP
Tryptophan: An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.
Source: MeSH 2007
Source - MeSH 2007
Source - MeSH 2007
Source - MeSH 2007
Source - CRISP
Source: CRISP
The following list attempts to classify Tryptophan into categories where each line is subset of the next.
Source: Diseases Database
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