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题名: Approach to Monte Carlo calculation of the buckling of supercoiled DNA loops
作者: Zhang, Y
刊名: PHYSICAL REVIEW E
出版日期: 2000
卷号: 62, 期号:5, 页码:R5923-R5926
关键词: PHASE-TRANSITIONS ;  SIMULATION ;  ALGORITHM ;  ENSEMBLE ;  ENERGY
学科分类: Physics
通讯作者: Zhang, Y , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: The short supercoiled circular DNA molecules are shown to be glassy systems and canonical Metropolis Monte Carlo simulations of the systems tend to get stuck in local metastable energy basins. A Monte Carlo algorithm is developed to alleviate the problem of "ergodicity breaking'' of the glassy systems, in which the Markov process is driven by an explicitly analytic weight factor with enhanced probability in both low- and high-energy regions. To characterize the degree of puckering of the supercoiled DNA loops, a different quantity of aplanarity is introduced as the shortest principal axis of configurational ellipsoid of DNA. With the suggested Monte Carlo method, the quantitative correlation between supercoiling degree and buckling of DNA is attained. With supercoiling stress increasing, the conformational transition from a circle to mono-, diplo-, or triple interwound superhelical structure will take place in a successive but decreasingly abrupt mode.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000165341700013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12885
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zhang, Y. Approach to Monte Carlo calculation of the buckling of supercoiled DNA loops[J]. PHYSICAL REVIEW E,2000,62(5):R5923-R5926.
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