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Plasma levels of XOD specific activity and nitrate/nitrite content are not altered in seropositive subjects. (A) XOD activity is an indicator of increased ROS production. (B) The nitrate/nitrite level, an indicator of an increase in iNOS activity and NO formation, was monitored by a Griess reagent assay. Data were derived from the means of triplicate observations/sample. The SD for all samples was <12%.
