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a The positive correlation between the two oxidized endpoints, nitrotyrosine and percent oxidized glutathione (r = 0.50), and the disparate distribution between cases (open circles) and controls (closed circles) with control subjects clustered at the lower (less oxidized) end of the distribution. b The negative correlation between glutathione concentration and oxidized nitrotyrosine levels (r = −0.41) and is consistent with the protective antioxidant function of glutathione
