Figure 1

γ-Glutamyl cycle, 1 Glutamate cysteine ligase (GCL), 2 Glutathione synthetase (GS), 3 Glutathione peroxidase, 4 Glutathione reductase, 5 Glutathione-S-transferases (detoxification reactions), 6 γ-glutamyl-transferase (GGT), 7 γ-glutamyl cyclotransferase (GCT), 8 5-Oxoprolinase, 9 Dipeptidase, R Protein, FAD, FADH 2 Flavin-adenine dinucleotide, NAD, NAD+ Nicotinamide-adenoside dinucleotide, NADP, NADPH+ Nicotinamide-adenoside dinucleotide phosphate, ADP, ATP Adenosine diphosphate, Adenosine triphosphate.