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Grazing and swarming phenotypes of Pantoea ananatis BRT175 biosurfactant mutants. The predicted operon is shown at the top for each strain, with a red “X” indicating the disrupted gene. (A) Grazing of P. ananatis BRT175 at different cell densities (250 to 8,000 cells) of D. discoideum AX2-214 after a 7-day incubation. WT, wild type. (B) Swarming after a 24-h incubation on 0.5% modified SM agar. (C) Swarming after 48 h on 0.5% modified M9 agar.
