Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2003-12-15
Physics
Condensed Matter
Statistical Mechanics
12 pages revtex, 6 eps-figures
Scientific paper
10.1103/PhysRevE.70.021905
We investigate by analytical means the stochastic equations of motion of a linear molecular motor model based on the concept of protein friction. Solving the coupled Langevin equations originally proposed by Mogilner et al. (A. Mogilner et al., Phys. Lett. {\bf 237}, 297 (1998)), and averaging over both the two-step internal conformational fluctuations and the thermal noise, we present explicit, analytical expressions for the average motion and the velocity-force relationship. Our results allow for a direct interpretation of details of this motor model which are not readily accessible from numerical solutions. In particular, we find that the model is able to predict physiologically reasonable values for the load-free motor velocity and the motor mobility.
Fogedby Hans C.
Metzler Ralf
Svane Axel
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