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Fluorescence-activated cell sorting (FACS) graph plotting cell granularity (side scatter A [SSC-A]) versus eGFP fluorescence intensity (in abscissas). (A) Uninfected cells, which determined eGFP background. The square marks the population considered positive. (B) Cells infected by B. henselae containing plasmid pHP161 (oriT+trwABC).
