Micro-mechanical measurement of the torsional modulus of DNA

被引：62

作者：

Strick, TR

Bensimon, D

Croquette, V

机构：

[1] Univ Paris 06, ENS, LPS, CNRS,UMR 8550, F-75231 Paris 05, France

[2] Univ Paris 07, ENS, LPS, CNRS,UMR 8550, F-75231 Paris, France

来源：

GENETICA | 1999年 / 106卷 / 1-2期

关键词：

DNA elasticity; DNA torsional rigidity; supercoiling;

D O I：

10.1023/A:1003772626927

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

The torsional modulus C of DNA is determined from the difference between the work of stretching a single overwound molecule and the work done in stretching one underwound by the same number of turns. The value obtained C/k(B)T=86 +/- 10 nm is within the range (75 +/- 25 nm) estimated by more indirect methods.

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页码：57 / 62

页数：6

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