Glutathione

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.