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Maximum-entropy calculation of the end-to-end distance distribution of force-stretched chains
Dai, LR; Liu, F; Ou-Yang, ZC; Dai, LR , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2003
发表期刊JOURNAL OF CHEMICAL PHYSICS
ISSN0021-9606
卷号119期号:15页码:8124-8132
摘要Using the maximum-entropy method, we calculate the end-to-end distance distribution of the force-stretched chain from the moments of the distribution, which can be obtained from the extension-force curves measured in single-molecule experiments. If one knows the force expansion of the extension through the (n-1)th power of a force, that is enough to calculate the n moments of the distribution. We examine the method with three force-stretched chain models: the Gaussian chain, free-joined chain, and self-avoiding chain on a two-dimensional lattice. The method reconstructs all distributions precisely. We also apply the method to force-stretched complex chain molecules: the hairpin and secondary structure conformations. We find that the distributions of homogeneous chains of the two conformational classes are quite different: there are two independent peaks in the hairpin distribution, while only one peak is observed in the distribution of secondary structure conformations. Our discussion shows that the end-to-end distance distribution, instead of extension-force curves, can reveal more important physical information. (C) 2003 American Institute of Physics.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
关键词Stranded-dna-molecules Polymer-molecules Thermodynamics Moments
学科领域Physics
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收录类别SCI
WOS记录号WOS:000185703100057
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13204
专题理论物理所1978-2010年知识产出
通讯作者Dai, LR , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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Dai, LR,Liu, F,Ou-Yang, ZC,et al. Maximum-entropy calculation of the end-to-end distance distribution of force-stretched chains[J]. JOURNAL OF CHEMICAL PHYSICS,2003,119(15):8124-8132.
APA Dai, LR,Liu, F,Ou-Yang, ZC,&Dai, LR , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2003).Maximum-entropy calculation of the end-to-end distance distribution of force-stretched chains.JOURNAL OF CHEMICAL PHYSICS,119(15),8124-8132.
MLA Dai, LR,et al."Maximum-entropy calculation of the end-to-end distance distribution of force-stretched chains".JOURNAL OF CHEMICAL PHYSICS 119.15(2003):8124-8132.
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