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  Fluctuating currents in stochastic thermodynamics. II. Energy conversion and nonequilibrium response in kinesin models

Altaner, B., Wachtel, A., & Vollmer, J. (2015). Fluctuating currents in stochastic thermodynamics. II. Energy conversion and nonequilibrium response in kinesin models. Physical Review E, 92(4): 042133. doi:10.1103/PhysRevE.92.042133.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-5EB9-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-D13F-C
Genre: Journal Article

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 Creators:
Altaner, Bernhard1, Author              
Wachtel, Artur1, Author              
Vollmer, Jürgen1, Author              
Affiliations:
1Group Principles of Self Organisation, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063312              

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 Abstract: Unlike macroscopic engines, the molecular machinery of living cells is strongly affected by fluctuations. Stochastic thermodynamics uses Markovian jump processes to model the random transitions between the chemical and configurational states of these biological macromolecules. A recently developed theoretical framework [A. Wachtel, J. Vollmer, and B. Altaner, Phys. Rev. E 92, 042132 (2015)] provides a simple algorithm for the determination of macroscopic currents and correlation integrals of arbitrary fluctuating currents. Here we use it to discuss energy conversion and nonequilibrium response in different models for the molecular motor kinesin. Methodologically, our results demonstrate the effectiveness of the algorithm in dealing with parameter-dependent stochastic models. For the concrete biophysical problem our results reveal two interesting features in experimentally accessible parameter regions: the validity of a nonequilibrium Green-Kubo relation at mechanical stalling as well as a negative differential mobility for superstalling forces.

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Language(s): eng - English
 Dates: 2015-10-142015
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevE.92.042133
BibTex Citekey: altaner-pre-2015
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Title: Physical Review E
Source Genre: Journal
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Pages: 13 Volume / Issue: 92 (4) Sequence Number: 042133 Start / End Page: - Identifier: ISSN: 1539-3755