Measurement of the phase diagram of DNA unzipping in the temperature-force plane

被引：94

作者：

Danilowicz, C ^{[1
]}

Kafri, Y ^{[1
]}

Conroy, RS ^{[1
]}

Coljee, VW ^{[1
]}

Weeks, J ^{[1
]}

Prentiss, M ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.078101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We separate double stranded lambda phage DNA by applying a fixed force at a constant temperature ranging from 15 to 50 degreesC, and measure the minimum force required to separate the two strands. The measurements also offer information on the free energy of double stranded DNA (dsDNA) at temperatures where dsDNA does not thermally denature in the absence of force. While parts of the phase diagram can be explained using existing models and free energy parameters, others deviate significantly. Possible reasons for the deviations between theory and experiment are considered.

引用

收藏

页码：078101 / 1

页数：4

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