Mechanically induced helix-coil transition in biopolymer networks

被引：38

作者：

Courty, S ^{[1
]}

Gornall, JL ^{[1
]}

Terentjev, EM ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

BIOPHYSICAL JOURNAL | 2006年 / 90卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1529/biophysj.105.067090

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The quasi-equilibrium evolution of the helical fraction occurring in a biopolymer network ( gelatin gel) under an applied stress has been investigated by observing modulation in its optical activity. Its variation with the imposed chain extension is distinctly nonmonotonic and corresponds to the transition of initially coiled strands to induced left-handed helices. The experimental results are in qualitative agreement with theoretical predictions of helices induced on chain extension. This new effect of mechanically stimulated helix-coil transition has been studied further as a function of the elastic properties of the polymer network: crosslink density and network aging.

引用

页码：1019 / 1027

页数：9

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