Role of ROS in SCF-mediated killing. (A) Percent survival of AP-RCLIN-EVO and AP-RLAB-EVO in the presence of SCF (7.5 μg/mL) and the indicated concentrations of H2O2. (B) Percent survival of AP-RCLIN-EVO and AP-RLAB-EVO in the presence of H2O2 (0.6%) and the indicated concentrations of SCF. (C) Percent survival of AP-RCLIN-EVO and AP-RLAB-EVO in the presence of SCF (7.5 μg/mL) and H2O2 (0.6%) at the indicated times. (D) Percent survival of AP-RCLIN-EVO and AP-RLAB-EVO in the presence of H2O2 (0.6%), nitrite (20 mM), and SCF (7.5 μg/mL). (E) ROS of AP-RCLIN-EVO and AP-RLAB-EVO in the presence of the indicated H2O2. Results (A–D) were obtained using antibiotic bactericidal assay. Results are displayed as mean ± SEM of three biological replicas, and significant differences are identified (*, P < 0.05; **, P < 0.01) as determined by analysis of variance (ANOVA).