ne (which is attached by normal peptide linage to a glycine) and the carboxyl group of the glutamate sidechain. It is an antioxidant, preventing damage to imporant cellular components caused by reactive oxygen species such as free radicals and peroxides.
Thiol groups are reducing agents, existing at a concentration of approximately 5 mM in animal cells. Glutathione reduces disulfide bondsformed within cytoplasmic proteins to cysteines by serving as an electron donor. In the process, glutathione