Kinetics of collapse and decollapse of a single double-stranded DNA chain

被引:8
作者
Yoshikawa, K
机构
[1] Division of Informatics for Sciences, Graduate School of Human Informatics, Nagoya University
关键词
D O I
10.1002/masy.19961060134
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Transition of a single duplex DNA between elongated coil and condensed globule has been studied by the technique of single molecular observation with fluorescence microscopy. It has become clear that individual DNA chains undergo first-order phase transition. We have observed the time-dependent change of the DNA structure accompanied with the phase transition from coil to globule. The speed of the compaction was found to be almost constant along the DNA chain. It is indicated that the coil-globule transition exhibits the phenomenon of ''nucleation and growth''. The process of the decollapse of a single DNA has also been observed, the time dependence of the long axis length being described as l similar to t(1.8).
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页码:367 / 378
页数:12
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