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. 2010 Apr 2;192(13):3259–3267. doi: 10.1128/JB.00083-10

FIG. 7.

FIG. 7.

Cells at swarm edge. (Top) Reversal. (A) A cell labeled with Alexa Fluor 488 (green) moves to the swarm edge (thin line). Between panels A and B, the motors reverse and the bundle comes apart. (B and C) The flagella transform to the curly form and project beyond the swarm edge. (D) The flagella return to the normal form as the motors resume their normal CCW rotation, and the cell swims away from the swarm edge. (Bottom) Deflection. (A′) A cell approaches the swarm edge obliquely. (B′ and C′) The cell pauses at the edge, and its flagella splay outwards. (D′) The cell is deflected inwards and the bundle reforms. The bodies of the labeled cells are highlighted in gray to aid the eye, and the phase-contrast images of other cells in the background appear dark.