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. Author manuscript; available in PMC: 2010 Jul 23.
Published in final edited form as: Physiol Rev. 2008 Oct;88(4):1243–1276. doi: 10.1152/physrev.00031.2007

FIG. 3.

FIG. 3

The four broad classes of biomarkers used to assess cellular oxidative stress in tissues. These categories include the measurement of oxidant production, cellular levels of antioxidants, oxidation products, and the antioxidant/pro-oxidant balance. 8-OH-dG, 8-hydroxydeoxyguanosine; GSH/GSSG, ratio of reduced glutathione to oxidized glutathione.