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 What is the role of selenium in supporting glutathione peroxidase activity? High Throughput Glutathione Peroxidase Assay Kit 7512 100 K: R&D Systems Solutions, Glutathione Skin Brightener Cream, 2 fl oz (59 ml) GpoA Glutathione Peroxidase Links Oxidative Stress Response, Antibiotic Persistence, and Virulence in Streptococcus pneumoniae bioRxiv