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Susceptibility of luciferase-expressing promastigotes (Pm) or amastigotes (Am) to increasing concentrations of A) hydrogen peroxide (H2O2), B) an NO releaser spermine NONOate (sNO), or C) peroxynitrite (ONOO−) in phosphate-buffered saline for 4 h. Percent survival was calculated by comparing luciferase activity in treated vs. untreated parasites.
