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Dai, LR; Liu, F; Ou-Yang, ZC; Dai, LR , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
Maximum-entropy calculation of the end-to-end distance distribution of force-stretched chains
Source PublicationJOURNAL OF CHEMICAL PHYSICS
KeywordStranded-dna-molecules Polymer-molecules Thermodynamics Moments
AbstractUsing 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.
2003
ISSN0021-9606
Volume119Issue:15Pages:8124-8132
Subject AreaPhysics
Indexed BySCI
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13204
Collection理论物理所科研产出_SCI论文
Corresponding AuthorDai, LR , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
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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