The glutathione peroxidase Gpx4 prevents lipid peroxidation and ferroptosis to sustain Treg cell activation and suppression of antitumor immunity: Cell Reports Figure 3 from Glutathione and mitochondria Semantic Scholar Frontiers Glutathione: A Samsonian life sustaining small molecule that protects against oxidative stress, ageing and damaging inflammation Glutathione reductase catalytic cycle MedLink Neurology Frontiers Research progress of glutathione peroxidase family (GPX) in redoxidation