Selective Small Molecule Activator of Patient Derived GPX4 Variant ACS Chemical Biology Glutathione Peroxidase 2 an overview ScienceDirect Topics TJ. Glutathione peroxidase is an important enzyme in cellular antioxidant defense systems, detoxifying peroxides and hydroperoxides. As a component of the glutathione cycle, it protects the liver from reactive oxygen metabolites. Selenocysteine The glutathione peroxidase Gpx4 prevents lipid peroxidation and ferroptosis to sustain Treg cell activation and suppression of antitumor immunity: Cell Reports Glutathione Peroxidase 4 GPX4 Antibody (LHM 2) (NBP3 07344) by Novus, Part of Bio Techne Re:Re: First line defence antioxidants superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) anti aging , ,