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Related to tryptophan: L-tryptophan
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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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.
Farlex Partner Medical Dictionary © Farlex 2012
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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
tryptophanAn 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).
Milk, sesame seeds, soy beans, spirulina, sunflower seeds, cashews.
Tryptophan has been promoted for its alleged ability to induce sleep, and as an antidepressint.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
A nutritionally essential amino acid; the l-isomer is a component of proteins.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
tryptophanAn 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 L-tryptophan, sold in USA as a non-prescription food additive was withdrawn by the American Food and Drugs Administration (FDA) because of reports of a severe muscle disorder apparently caused by an unidentified contaminant.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.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
tryp·to·phan(Trp, W) (trip'tŏ-fan)
A nutritionally essential amino acid.
Medical Dictionary for the Dental Professions © Farlex 2012