Kinetics of the helix-coil transition

被引：5

作者：

Allahverdyan, A. E. ^{[1
]}

Gevorkian, S. G. ^{[1
]}

Simonian, A. ^{[2
]}

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] Auburn Univ, Mat Res & Educ Ctr, Auburn, AL 36849 USA

来源：

EPL | 2009年 / 86卷 / 05期

关键词：

TIME-DEPENDENT STATISTICS; ATOM MODEL SIMULATION; ISING-BASED THEORY; GLASS-TRANSITION; COLLAGEN; THERMODYNAMICS; POLYPEPTIDES; TEMPERATURE; HYSTERESIS; STABILITY;

D O I：

10.1209/0295-5075/86/53002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on the Zimm-Bragg model we study cooperative helix-coil transition driven by a finite-speed change of temperature. There is an asymmetry between the coil. helix and helix. coil transition: the latter is displayed already for finite speeds, and takes shorter time than the former. This hysteresis effect has been observed experimentally, and it is explained here via quantifying system's stability in the vicinity of the critical temperature. A finite-speed cooling induces a non-equilibrium helical phase with the correlation length larger than in equilibrium. In this phase the characteristic length of the coiled domain and the non-equilibrium specific heat can display an anomalous response to temperature changes. Several pertinent experimental results on the kinetics of helical biopolymers are discussed in detail. Copyright (C) EPLA, 2009

引用

页数：6

共 36 条

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