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Flagellar genes. The genes of the sodium ion‐driven polar flagella of V. cholerae (a), the proton‐driven lateral flagella of V. parahaemolyticus (b), and the proton‐driven peritrichous flagella of E. coli (c) and their gene configurations are shown. The arrows above the gene names indicate the transcription units, and the numbers at the beginning indicate the order of the transcription hierarchy
