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(a) Wobbling rate of the bacterium with respect to the normalized radius of the channel, Rch/r, for λ/s = 3 and L/s = 2 (blue plus signs), 3 (green squares), 4 (red left-triangles), 6 (cyan stars) and 8 (magenta circles). (b) Relationship between wobbling rate and tail length for wide channels (Rch/r = 13), blue circles represent the wobbling rates. To see this figure in color, go online.
