• Corpus ID: 2031096

Entropic Elasticity, Cooperative Extensibility and Supercoiling Property of DNA: A Unified Viewpoint

@article{Haijun1999EntropicEC,
  title={Entropic Elasticity, Cooperative Extensibility and Supercoiling Property of DNA: A Unified Viewpoint},
  author={Zhou Haijun and Zhang Yang and Ou-Yang Zhong-can},
  journal={arXiv: Soft Condensed Matter},
  year={1999}
}
A unified model is constructed to study the recently observed DNA entropic elasticity, cooperative extensibility, and supercoiling property. With the introduction of a new structural parameter (the folding angle ϕ), bending deformations of sugar-phosphate backbones, steric effects of nucleotide basepairs, and short-range basestacking interactions are considered. The comprehensive agreement of theoretical results with experimental observations on both torsionally relaxed and negatively… 

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These expressions for r0 and R follow from the facts that, for relaxed DNA, the axial distance between adjacent basepairs is 0.34 nm and there are 10.5 basepairs in one period of the double-helix

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