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see coenzymecoenzyme
, any one of a group of relatively small organic molecules required for the catalytic function of certain enzymes. A coenzyme may either be attached by covalent bonds to a particular enzyme or exist freely in solution, but in either case it participates intimately in
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γ-glutamyl cysteinyl glycine, a tripep-tide formed from radicals of three amino acids—glutamic acid, cysteine, and glycine. A peculiarity of the structure of glutathione is the peptide bond between cysteine and glutamic acid, in which the γ-carboxyl of the glutamic acid participates. Glutathione is present in all living organisms and is very important for oxidation-reduction reactions in connection with the capacity of the sulfhydryl group (SH—) of cysteine to undergo the reversible reaction

Glutathione can act as a coenzyme in the action of cathepsins, papain, and other proteolytic enzymes. The function of glutathione in metabolism apparently also includes the protection of the SH group of cytoplasm proteins against oxidation.


C10H17O6N3S A widely distributed tripeptide that is important in plant and animal tissue oxidation reactions.
References in periodicals archive ?
Several factors have made this study important and they are as follow: lack of such studies in the country and the ambiguity in the condition of glutathione reductase and catalase after different training methods, especially in females' sports.
Mannervik, Levels of glutathione, glutathione reductase and glutathione S-transferase activities in rat lung and liver, Biochim Biophys Acta, 582:67-78 (1979).
There was a significant reduction in the glutathione peroxidase, glutathione reductase, catalase, and SOD levels of Group II (Alzheimer group) mice when compared to Group I (Normal control) mice (P < 0.
Glutathione reductase (GSR) reduces glutathione disulfide (GSSG) to the sulfhydryl form GSH, which is an important cellular antioxidant (50).
2004; Thomas 2009); and d) inhibiting glutathione reductase, thereby limiting the regeneration of GSH from GSSG (Massey and Williams 1965; Styblo et al.
20 A study of epileptic patients found glutathione reductase to be low in comparison with the control group.
The supernatant thus obtained was termed as tissue homogenate, was used for essay of reduced glutathione, glutathione reductase and ceruloplasmin.
The levels of glutathione reductase, uric acid or blood glucose, protective factors in oxidative stress balance, haven't been influenced by mud treatment.
The supernatant (soluble fraction) was used as the crude extract for the superoxide dismutase (SOD), catalase (CAT), peroxidase (APX) and glutathione reductase (GR) assay (Khan and Panda, 2008).
Assessment was via the use of blood parameters (the capacity of the antioxidant enzymes superoxide dismutase, glutathione peroxidase, glutathione reductase and catalase and the inflammatory marker C-reactive protein) at baseline and follow up.
Glutathione reductase, selenium-dependent glutathione peroxidase, glutathione levels, and lipid peroxidation in freshwater bivalves, Unio tumidus, as biomarkers of aquatic contamination in field studies.
Dokki, Egypt; glutathione reductase activity of the liver homogenate was determined using a kit purchased from Oxis Research[TM] Co.

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