glutathione is an example of what kind of peptide Glutathione, a tripeptide found in virtually all cells, functions as a reducing agent. The structure is: amino acids make up glutathione? Glutathione: Master Antioxidant, Reducing Oxidative
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Functional Compounds and Foods of Plant Origin

Furthermore, the susceptibility of WT or Cys-to-Ser mutants of GLRX to H 2 O 2 - or GSSG-mediated inactivation was evaluated by measuring the reaction of GLRX with eosin-labeled GSSG or eosin-conjugated glutathionylated BSA, to model physiological substrates
Peng ZF, Koh CH, Li QT, Manikandan J, Melendez AJ, Tang SY et al

Curr Biol 24(10):R453R462

Yu ZM, Parker L, Dummer TJB

Thus, there is ample evidence of non-infectious hyperinflammatory conditions in CGD patients, particularly granulomas and colitis [28]
