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Racial differences in total Superoxide Dismutase (SOD) activity. A. African American (AA) and Caucasian (C) human plasma. B. Basal HUVEC culture, AA and C. C. SOD1 activity basal HUVEC culture, AA and C. Values normalized to protein content. SOD2 protein expression levels in AA (shaded) and C (open) HUVECs, basal levels. ImageJ densitometric analysis of bands expressed in relation to β–actin. Bars show mean ±SE. *P<0.05 between ethnic group.
