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. 2013 Jul 25;8(7):e70147. doi: 10.1371/journal.pone.0070147

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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A) Illustrating how motility is scored on motility agar. Motility is scored on a 5 step scale where (−) is non-motile and+++is fully motile. B) Motility and phase variation of wild type and evolved Salmonella typhimurium strains. FljBA^ON cells expressing fljB type of flagellum and FljBA^OFF cells expressing fliC type of flagellum. Percentage indicates the fraction of cells (based on whole-genome sequencing) in mouse-adapted population that were in FljBA^ON state.