Sigma Aldrich Glutathione Peroxidase from bovine erythrocytes, CAS 9013 66 5, lyophilized powder, 300 units mg protein 100 units Kinetic characterization of wildtype and mutant human thioredoxin glutathione reductase defines its reaction and regulatory mechanisms Brandstaedter 2018 The FEBS Journal Wiley Online Library Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols Glutathione reductase Sigma Aldrich Sigma Aldrich Fine Chemicals Biosciences Glutathione Reductase from baker's Fisher Scientific The glutathione peroxidase Gpx4 prevents lipid peroxidation and ferroptosis to sustain Treg cell activation and suppression of antitumor immunity: Cell Reports