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Flagellar rotation patterns of E. coli cells transformed with Tar variants. Rotation patterns were determined in the −CheB/R (UU2610) or +CheB/R (UU2612) cells. Both strains lacked all native chemoreceptors. Each histogram summarizes the behavior of rotating cells as exclusively CCW, predominantly CCW, frequently reversing with no overall directional bias, predominantly CW, and exclusively CW (from left to right, respectively).
