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Absence of flagellar and chemotaxis genes from Sphaerochaeta genomes. (A) Transmission electron micrograph showing the nonspiral shape of S. globosa strain Buddy and S. pleomorpha strain Grapes cells. (B) Heat map showing the presence or absence and the level of amino acid identity (see scale) of T. pallidum chemotaxis, flagellar assembly, and locomotion gene homologs in selected spirochetal genomes.
