Glutathione-dependent generation of reactive oxygen species by the peroxidase-catalyzed redox cycling of flavonoids.


Catalytic concentrations of apigenin (a flavone containing a phenol B ring) and naringin or naringenin (flavanones containing a phenol B ring) caused extensive GSH oxidation at a physiological pH in the presence of peroxidase. Only catalytic H2O2 concentrations were required, indicating a redox cycling mechanism that generated H2O2 was involved. Extensive… (More)


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