Non-equilibrium fluctuations and mechanochemical couplings of a molecular motor

Details Non-equilibrium fluctuations and mechanochemical couplings of a molecular motor Non-equilibrium fluctuations and mechanochemical couplings of a molecular motor

2007-07-30

arxiv.org/abs/0707.4344v1

Phys. Rev. Lett. , 99, 158102 (2007)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures, accepted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.99.158102

We investigate theoretically the violations of Einstein and Onsager relations, and the efficiency for a single processive motor operating far from equilibrium using an extension of the two-state model introduced by Kafri {\em et al.} [Biophys. J. {\bf 86}, 3373 (2004)]. With the aid of the Fluctuation Theorem, we analyze the general features of these violations and this efficiency and link them to mechanochemical couplings of motors. In particular, an analysis of the experimental data of kinesin using our framework leads to interesting predictions that may serve as a guide for future experiments.

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