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Killing of Δpgm Y. pestis in postactivated macrophages depends on iNOS expression. BMM from iNOS+/+ (a- d) or iNOS-/- (e- h) mice were infected with KIM10+/GFP (a, b, e, and f) or KIM10/GFP (c, d, g, and h), exposed to IFN-γ, and processed for phase and fluorescence microscopy as described in the legend of Fig. 1.
