Randomly cross-linked polymer models
Soft Condensed Matter
2017-05-12 v1 Biological Physics
Abstract
Polymer models are used to describe chromatin, which can be folded at different spatial scales by binding molecules. By folding, chromatin generates loops of various sizes. We present here a randomly cross-linked (RCL) polymer model, where monomer pairs are connected randomly. We obtain asymptotic formulas for the steady-state variance, encounter probability, the radius of gyration, instantaneous displacement and the mean first encounter time between any two monomers. The analytical results are confirmed by Brownian simulations. Finally, the present results can be used to extract the minimum number of cross-links in a chromatin region from {conformation capture} data.
Cite
@article{arxiv.1705.04041,
title = {Randomly cross-linked polymer models},
author = {Ofir Shukron and David Holcman},
journal= {arXiv preprint arXiv:1705.04041},
year = {2017}
}