| Issue |
EPL
Volume 96, Number 4, November 2011
|
|
|---|---|---|
| Article Number | 48005 | |
| Number of page(s) | 6 | |
| Section | Interdisciplinary Physics and Related Areas of Science and Technology | |
| DOI | https://doi.org/10.1209/0295-5075/96/48005 | |
| Published online | 09 November 2011 | |
Monomer dynamics of a wormlike chain
Institut für Theoretische Physik, Universität Leipzig - PF 100920, 04009 Leipzig, Germany, EU
Received:
28
July
2011
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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