2004/02/06 by Stefan Klumpp, Reinhard Lipowsky
Physics and Astronomy · Biochemistry, Genetics and Molecular Biology · #cond-mat.stat-mech #q-bio.SC
paper · pdf · doi:10.1209/epl/i2003-10155-6
published as Europhys. Lett. 66, 90-96 (2004) · 7 pages, 4 figures, epl style (.cls-file included), to appear in Europhys. Lett. (http://www.edpsciences.org/epl)
arxiv created 2004/02/06 · arxiv updated 2009/12/01
Systems with two species of active molecular motors moving on (cytoskeletal) filaments into opposite directions are studied theoretically using driven lattice gas models. The motors can unbind from and rebind to the filaments. Two motors are more likely to bind on adjacent filament sites if they belong to the same species. These systems exhibit (i) Continuous phase transitions towards states with spontaneously broken symmetry, where one motor species is largely excluded from the filament, (ii) Hysteresis of the total current upon varying the relative concentrations of the two motor species, and (iii) Coexistence of traffic lanes with opposite directionality in multi-filament systems. These theoretical predictions should be experimentally accessible.