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Flow cytometry of GFP reporter constructs B. henselae pANT3/882Str (A), B. henselae pVBGFPR/882Str (B), and B. henselae pVBGFPF/882Str after coculture with HMEC-1 for 24 h (C). Samples were analyzed by flow cytometry as described in Materials and Methods. The geometric mean of the fluorescence intensity for each of the samples is designated by the x value.
