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Effect of rifampin (Rif.) together with IFN-γ on the expression of iNOS. (a) Western blot analysis of the effect of IFN-γ and rifampin (Rif) on iNOS expression in A549 cells at 24 h after stimulation with IFN-γ (100 ng/ml) alone, rifampin alone, or IFN-γ plus rifampin compared to the level of β-actin expression. (b) Densitometric analysis of the blot presented in panel a. Similar results were obtained in three separate experiments.
