Pulling pinned polymers and unzipping DNA

被引：174

作者：

Lubensky, DK ^{[1
]}

Nelson, DR ^{[1
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.85.1572

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study a class of micromanipulation experiments, exemplified by the pulling apart of the two strands of double-stranded DNA. When the pulling force is increased to a critical value, an "unzipping" transition occurs. For random DNA sequences with short-ranged correlations, we obtain exact results for the number of monomers liberated and the specific heat, including the critical behavior at the transition. Related systems include a random heteropolymer pulled away from an adsorbing surface and a vortex line in a type II superconductor tilted away from a fragmented columnar defect.

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页码：1572 / 1575

页数：4

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