Volume 96, Number 4, November 2011
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||09 November 2011|
Monomer dynamics of a wormlike chain
Institut für Theoretische Physik, Universität Leipzig - PF 100920, 04009 Leipzig, Germany, EU
Accepted: 2 October 2011
We derive the stochastic equations of motion for a tracer that is tightly attached to a semiflexible polymer and confined or agitated by an externally controlled potential. The generalised Langevin equation, the power spectrum, and the mean-square displacement for the tracer dynamics are explicitly constructed from the microscopic equations of motion for a weakly bending wormlike chain by a systematic coarse-graining procedure. Our accurate analytical expressions should provide a convenient starting point for further theoretical developments and for the analysis of various single-molecule experiments and of protein shape fluctuations.
PACS: 87.15.H- – Dynamics of biomolecules / 87.80.Nj – Single-molecule techniques
© EPLA, 2011
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