Main Page | See live article | Alphabetical index Glutathione is glutamylcysteinylglycine, a tripeptide. It contains an unusual peptide linkage between the amine group of cysteine and the carboxyl group of the glutamate side chain. Sulfhydryl is kept in a reduced state within ~5 mm in animal cells. In effect, gluathione reduces any disulfide bonds formed within cytoplasmic proteins to cysteines by acting as a buffer. Glutathione participates in leucotriene synthesis and is a cofactor for the enzyme glutathione peroxidase. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.