Alignment and in silico analysis of the GumB sequence (Fig. S1); transmission electron micrographs of mutant cells (Fig. S2); evidence of defective swimming motility in the ΔgumB and ΔgumB wza strains (Fig. S3); evidence that gumB mutant phenotypes are not strain specific (Fig. S4); legend to supplemental movie.
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Pliable smooth morphology of wild-type strain K904 and rugose elastic morphology of the isogenic ΔgumB mutant (Movie S1).
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