Credit: Yardimci et al
(A) A fluorescently labeled straight filament in a background suspension of unlabeled filaments preferentially diffuses along its long axis. (B) Helical filament exhibits corkscrewing dynamics. (C) Helix-rod fusion filaments are permanently caged. In all panels, a time sequence of fluorescently labeled filaments is shown on the Top. Schematics of different filament shapes with the background filaments are shown on the Bottom.