Effect of Intrinsic Curvature on Semiflexible Polymers

Details Effect of Intrinsic Curvature on Semiflexible Polymers Effect of Intrinsic Curvature on Semiflexible Polymers

2009-04-03

arxiv.org/abs/0904.0513v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevE.80.051904

Recently many important biopolymers have been found to possess intrinsic curvature. Tubulin protofilaments in animal cells, FtsZ filaments in bacteria and double stranded DNA are examples. We examine how intrinsic curvature influence the conformational statistics of such polymers. We give exact results for the tangent-tangent spatial correlation function C(r) = t(s).t(s + r), both in two and three dimensions. Contrary to expectation, C(r) does not show any oscillatory behavior, rather decays exponentially and the effective persistence length has strong length dependence for short polymers. We also compute the distribution function P(R) of the end to end distance R and show how curved chains can be distinguihed from WLC using loop formation probability.

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