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. 2021 Apr 24;10(5):661. doi: 10.3390/antiox10050661

Figure 2.

Figure 2

Scheme showing the biosynthesis of GSH (A), and the glutathione cycle and transport of constituent amino acids and related substrates (B). Figure 2B is modified from Bachhawat AK, Yadav S. The glutathione cycle: glutathione metabolism beyond the γ-glutamyl cycle. IUBMB Life. 2018 July; 70(7):585–592. doi: 10.1002/iub.1756. Epub 2018 Apr 17. PMID: 29667297. Wiley Publishers [19]. GCL—glutamate–cysteine ligase, GS—glutathione synthetase, GSH—glutathione. 5-OP-5-oxoproline. Numbers refer to representative transporters involved. 1–2. MRP family; 3. EAATS family; 4. Peptide transporters; 5–6. System Xc and other transporters; 7. Glycine transporter; 8. Disulfide transporter.