FIG. 5. Mathematical model of drag-induced translocation along a smooth flagellar filament. The fibres experience an anisotropic drag due to their motion in the proximity of the rotating flagellar filament. The phage, shown in green, has a capsid head of size 2ah, a tail of length Lt, fibres of helical shape with helix angle α and cross-sectional radius rfib, and is translocating along a straight flagellar filament, shown in light blue, of radius Rfl. The flagellar filament is rotating at a rate ωfl. The phage is translocating at speed U and rotating with rate ωp about the flagellar filament. The inset shows a short segment of the phage fibre at a distance d from the local tangent plane of the flagellar filament.
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