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Schematic representation of the glutathione cycle and ability of thiols to scavenge ROS. Abbreviations: GSH, reduced glutathione; GSSG, oxidized glutathione; GR, glutathione reductase; GPx, glutathione peroxidase; GLC, glutamate cysteine ligase; L-Cys, L-Cysteine; NAC, N-acetylcysteine; ROS, reactive oxygen species.
