tryptophan


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Related to tryptophan: L-tryptophan

tryptophan

 [trip´to-fan]
a naturally occurring amino acid, one of the essential amino acids; it is a precursor of serotonin. Adequate levels in the diet may mitigate pellagra by compensating for deficiencies of niacin.

tryp·to·phan (Trp, W),

(trip'tō-fan),
2-Amino-3-(3-indolyl)propionic acid; the l-isomer is a component of proteins; a nutritionally essential amino acid.

tryptophan

(trĭp′tə-făn′) also

tryptophane

(-fān′)
n.
An essential amino acid, C11H12N2O2, formed from proteins during digestion by the action of proteolytic enzymes. It is necessary for normal growth and development and is the precursor of several substances, including serotonin and niacin.

tryptophan

An essential amino acid, which is a key building block in protein biosynthesis. It is a precursor for serotonin (a neurotransmitter) and niacin (a B vitamin).

Dietary sources
Milk, sesame seeds, soy beans, spirulina, sunflower seeds, cashews.
 
Fringe nutrition
Tryptophan has been promoted for its alleged ability to induce sleep, and as an antidepressint.

tryp·to·phan

(W) (trip'tŏ-fan)
A nutritionally essential amino acid; the l-isomer is a component of proteins.

tryptophan

An antidepressant drug. L-tryptophan, sold in USA as a non-prescription food additive was withdrawn by the American Food and Drugs Administration (FDA) because of reports of a severe muscle disorder apparently caused by an unidentified contaminant. It is used only by hospital specialists who are aware of the risks. A brand name is Optimax.
Tryptophanclick for a larger image
Fig. 306 Tryptophan . Molecular structure.

tryptophan (W, Trp)

one of 20 AMINO ACIDS common in protein. It has a nonpolar ‘R’ group structure and is relatively insoluble in water. See Fig. 306 . The ISOELECTRIC POINT of tryptophan is 5.9.

Tryptophan

An essential amino acid that has to consumed in the diet because it cannot be manufactured by the body. Tryptophan is converted by the body to niacin, one of the B vitamins.
Mentioned in: Hartnup Disease

tryp·to·phan

(Trp, W) (trip'tŏ-fan)
A nutritionally essential amino acid.
References in periodicals archive ?
The liver also regulates circulating tryptophan levels by synthesizing NA[D.sup.+] from dietary tryptophan; in the periphery, cells cannot synthesize NA[D.sup.+] but can recycle metabolized NA[D.sup.+] with the enzyme nicotinamide phosphoribosyltransferase (NAMPT; nicotinamide ribonucleotide).
Pulses, beans and lentils also contain high amounts of tryptophan and B vitamins.
A key co-factor for the enzymes that metabolize tryptophan into serotonin and melatonin is vitamin B (6).
For one, the mean rate of serotonin synthesis is 52% higher in normal males than normal females, giving them a greater buffer when dietary intake of tryptophan is low.
Harriman, "Further comments on the redox potentials of tryptophan and tyrosine," The Journal of Physical Chemistry, vol.
Alcohol impairs the transport of tryptophan into the brain, where it's needed to make melatonin.
Further, when tryptophan was doubled in the mice's feed, the number of such cells rose by about 50 per cent.
"The more tryptophan the mice had in their diet, the more of these immune cells they had."
And foods high in tryptophan help us produce serotonin, the relaxing and calming brain chemical.
Tryptophan (Trp), an essential amino acid, constitutes a central component in human and animal protein synthesis, and it serves as the sole source of substrates that facilitate the generation of a range of crucial molecules.