Section 10.3. Oxygen , Cell Function, and Oxidative Stress Study Guide Edubirdie 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 Simplify your Glutathione Measurements Arbor Assays Rapid and effective protocol to measure glutathione peroxidase activity Bulletin of the National Research Centre Springer Nature Link Glutathione peroxidase 1 (GPX1) (U49S), human, recombinant Cusabio Biomol.com