Helix or coil? Fate of a melting heteropolymer

被引：35

作者：

Oshanin, G. ^{[1
]}

Redner, S. ^{[1
,2
,3
]}

机构：

[1] Univ Paris 06, Lab Phys Theor Mat Condensee, F-75252 Paris, France

[2] Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA

[3] Boston Univ, Dept Phys, Boston, MA 02215 USA

来源：

EPL | 2009年 / 85卷 / 01期

关键词：

DISORDERED-SYSTEMS; BROWNIAN-MOTION; DNA; TRANSITIONS; FLUX;

D O I：

10.1209/0295-5075/85/10008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the probability that a partially melted heteropolymer at the melting temperature will either melt completely or return to a helix state. This system is equivalent to the splitting probability for a diffusing particle on a finite interval that moves according to the Sinai model. When the initial fraction of melted polymer is g, the melting probability fluctuates between different realizations of monomer arrangements on the chain. For a fixed value of g, the melting probability distribution changes from unimodal to a bimodal as the strength of the disorder is increased. Copyright (C) EPLA, 2009

引用

收藏

页数：5

相关论文

共 20 条

[1] Sequence sensitivity of breathing dynamics in heteropolymer DNA [J].

Ambjornsson, Tobias ;

Banik, Suman K. ;

Krichevsky, Oleg ;

Metzler, Ralf .

PHYSICAL REVIEW LETTERS, 2006, 97 (12)

[2] PHASE-TRANSITIONS IN DNA [J].

AZBEL, MY .

PHYSICAL REVIEW A, 1979, 20 (04) :1671-1684

[3] NON-FICKIAN STEADY FLUX IN A ONE-DIMENSIONAL SINAI-TYPE DISORDERED SYSTEM [J].

BURLATSKY, SF ;

OSHANIN, GS ;

MOGUTOV, AV ;

MOREAU, M .

PHYSICAL REVIEW A, 1992, 45 (10) :R6955-R6957

[4] Exponential functionals of Brownian motion and disordered systems [J].

Comtet, A ;

Monthus, C ;

Yor, M .

JOURNAL OF APPLIED PROBABILITY, 1998, 35 (02) :255-271

[5] BROWNIAN-MOTION OF A CLASSICAL PARTICLE THROUGH POTENTIAL BARRIERS - APPLICATION TO HELIX-COIL TRANSITIONS OF HETEROPOLYMERS [J].

DEGENNES, PG .

JOURNAL OF STATISTICAL PHYSICS, 1975, 12 (06) :463-481

[6]

Gardiner CW., 1985, HDB STOCHASTIC METHO

[7] Random time-scale invariant diffusion and transport coefficients [J].

He, Y. ;

Burov, S. ;

Metzler, R. ;

Barkai, E. .

PHYSICAL REVIEW LETTERS, 2008, 101 (05)

[8] Localization of denaturation bubbles in random DNA sequences [J].

Hwa, T ;

Marinari, E ;

Sneppen, K ;

Tang, LH .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2003, 100 (08) :4411-4416

[9] RANDOM DIFFERENCE EQUATIONS AND RENEWAL THEORY FOR PRODUCTS OF RANDOM MATRICES [J].

KESTEN, H .

ACTA MATHEMATICA, 1973, 131 (3-4) :207-248

[10] Sequence-dependent basepair opening in DNA double helix [J].

Krueger, A ;

Protozanova, E ;

Frank-Kamenetskii, MD .

BIOPHYSICAL JOURNAL, 2006, 90 (09) :3091-3099