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dna supercoiling

Ajeet Kumar's picture

A singularity free approach for Kirchhoff rods having uniformly distributed electrostatic charge

We present a singularity free formulation and its efficient numerical implementation for the spatial deformation of Kirchhoff rods having uniformly distributed electrostatic charge. Due to the presence of continuously distributed charge, the governing equations of the Kirchhoff rod become a system of integro-differential equations which is singular at every arc-length. We show that this singularity is of removable type which, ones removed, makes the system well defined everywhere. No cutoff length or mollifier is used to remove this singularity.

Plectonemic DNA Mechanics

a recent pre-print about the mechanics of plectonemic DNA in extension-rotation experiments (under submission Biophysical Journal)

http://arxiv.org/abs/0811.1840

Journal version: http://www.cell.com/biophysj/abstract/S0006-3495(09)00564-5

Authors: N. Clauvelin, B. Audoly,  S. Neukirch

Abstract:

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