Bulk Mail Clerk Career. *A job as a Bulk Mail Clerk falls under the broader career category of Postal Service Clerks. The information on this page will generally apply to all careers in this category. We are still seeking more specific information about this career from experts in this field. If you can provide us with more information, .
Glutathione is a tripeptide formed by a peptide linkage between the amine group of cysteine linked to glycine and the carboxyl group of the glutamate side-chain. It is an abundant cellular reducing agent, whose major biological function is mitigating oxidative damage to biological macromolecules.
Glutathione may well be the most important intracellular defense against damage by reactive oxygen species. It is a tripeptide (glutamyl-cysteinyl-glycine). The cysteine provides an exposed free sulphydryl group (SH) that is very reactive, providing an abundant target for radical attack. Reaction with radicals oxidizes glutathione, but the reduced form is regenerated in a redox cycle involving glutathione reductase and the electron acceptor NADPH.