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glutathione

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glu⋅ta⋅thi⋅one

[gloo-tuh-thahy-ohn]
–noun Biochemistry.
a crystalline, water-soluble peptide of glutamic acid, cysteine, and glycine, C10H17N3O6S, found in blood and in animal and plant tissues, and important in tissue oxidations and in the activation of some enzymes.

Origin:
1920–25; gluta(mic acid) + thi- + -one
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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glu·ta·thi·one   (glōō'tə-thī'ōn')   
n.  A polypeptide, C10H17N3O6S, of glycine, cysteine, and glutamic acid that occurs widely in plant and animal tissues and is important in biological oxidation-reduction reactions.

[gluta(mine) + thi(o)- + -one.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: glu·ta·thi·one
Pronunciation: "glüt-&-'thI-"On
Function: noun
: a peptideC10H17N3O6S that contains one amino acid residue each of glutamic acid, cysteine, and glycine, that occurs widely in plant and animal tissues, and that playsan important role in biological oxidation-reduction processes and as a coenzyme
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

glutathione glu·ta·thi·one (gl&oomacr;'tə-thī'ōn')
n.
A tripeptide of the amino acids glycine, cystine, and glutamic acid occurring widely in plant and animal tissues and forming reduced and oxidized forms important in biological oxidation-reduction reactions.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia

glutathione

a tripeptide (i.e., compound composed of three amino acids), the chemical name of which is gamma-l-glutamyl-l-cysteinylglycine. Widely distributed in nature, it has been isolated from yeast, muscle, and liver. Glutathione has a role in the respiration of both mammalian and plant tissues and protects red blood cells against hydrogen peroxide, which is a toxic by-product of many metabolic reactions, by reducing the peroxide to water. It serves as a cofactor for various enzymes; e.g., glyceraldehyde-3-phosphate dehydrogenase, to which it becomes firmly bound.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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