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(A) Confocal microscopic analysis of PNAG expression by avirulent Y. pestis strain KIM6+ or KIM6 (Δpgm) grown at either 28 or 37°C overnight in BHIB. (B) Reactivity of Y. pestis strain KIM6+ grown at 28°C with MAb F598-AF488 to PNAG after treatment of bacterial cells with either chitinase (control) or the PNAG-degrading enzyme dispersin B. Bars, 10 µm.
