The present note is devoted to a bird's eye view of an interdisciplinary research area in which the authors have been engaged during the past few years. Here the controversial question concerning the validity of the loose-coupling versus the lever-arm models in the actomyosin dynamics is addressed by re-interpreting the washboard model earlier proposed by some of us. Specifically, we consider the diffusive motion with jumps of a particle in the presence of an asymmetric periodic potential with a unique minimum subject to half-period wide shifts occurring at random Poisson distributed times. A number of relevant quantities are explicitly obtained via averages of functions of the random variable representing the particle position.
On the Dynamics of Actomyosin Systems and the Origin of Washboard Potentials
CAPUTO, LUIGIA;
2006-01-01
Abstract
The present note is devoted to a bird's eye view of an interdisciplinary research area in which the authors have been engaged during the past few years. Here the controversial question concerning the validity of the loose-coupling versus the lever-arm models in the actomyosin dynamics is addressed by re-interpreting the washboard model earlier proposed by some of us. Specifically, we consider the diffusive motion with jumps of a particle in the presence of an asymmetric periodic potential with a unique minimum subject to half-period wide shifts occurring at random Poisson distributed times. A number of relevant quantities are explicitly obtained via averages of functions of the random variable representing the particle position.
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