EOG8N8TJV GO:0006749 3/39 glutathione metabolic process biological_process "The chemical reactions and pathways involving glutathione, the tripeptide glutamylcysteinylglycine, which acts as a coenzyme for some enzymes and as an antioxidant in the protection of sulfhydryl groups in enzymes and other proteins; it has a specific role in the reduction of hydrogen peroxide (H2O2) and oxidized ascorbate, and it participates in the gamma-glutamyl cycle." [CHEBI:16856, ISBN:0198506732] EOG8N8TJV GO:0003840 3/39 gamma-glutamyltransferase activity molecular_function "Catalysis of the reaction: (5-L-glutamyl)-peptide + an amino acid = peptide + 5-L-glutamyl-amino acid." [EC:2.3.2.2]