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MPO and AOPPs are increased in subjects with Chagas' disease. The plasma levels of MPO-specific activity (A), MPO protein content (B), and AOPPs (C) were determined for seronegative and seropositive subjects (n = 121 in each group) by assays described in Materials and Methods. Data (means of triplicate observations for each sample) are presented in box plots (see the description in the legend to Fig. 2). The SD for triplicate observations for all samples was <12%.
