Europhys. Lett, 47 (2), pp. 171-174 (1999)
Dynamics of taut DNA chains
F. Brochard-Wyart 1, A. Buguin 1 and P. G. de Gennes 2
1 Laboratoire PCC, Institut Curie
11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
2 Collège de France - 11 place Marcellin Berthelot, 75005 Paris Cedex 05, France
(received 30 October 1998; accepted in final form 12 May 1999)
PACS. 36.20 - Macromolecules and polymer molecules.
PACS. 87.15 - Biomolecules: structure and physical properties.
We discuss the dynamics of stretched DNA chains, subjected to a tension force f, in a "taut'' regime where ( being the unperturbed persistence length). We deal with two variables: the local transverse displacements u, and the longitudinal position of a monomer . The variables u and follow two distinct Rouse equations, with diffusion coefficients (where is the solvent viscosity) and .
We apply these ideas to a discussion of various transient regimes.
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