FIG. 2.

Effect of macrophage-derived ROI on S nitrosylation. S-Nitroso-BSA (A) and NO₂⁻ (B) concentrations were determined in activated macrophage supernatants incubated in Hanks balanced salt solution plus BSA (4 mg/ml) alone (□) or supplemented with SOD (100 U/ml) (⧫), catalase (100 U/ml) (▵), or SOD plus catalase (•). Each point represents the mean ± standard error of the mean of three experiments, each performed on two mice. OD, optical density.