Microscopics of complexation between long DNA molecules and positively charged colloids

被引：43

作者：

Keren, K ^{[1
]}

Soen, Y

Ben Yoseph, G

Gilad, R

Braun, E

Sivan, U

Talmon, Y

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] Technion Israel Inst Technol, Inst Solid State, IL-32000 Haifa, Israel

[3] Technion Israel Inst Technol, Dept Chem Engn, IL-32000 Haifa, Israel

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.89.088103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Extensive atomic force and electron microscopy reveal a new, generic DNA-colloid complex with a fixed number of DNA bases per colloid. The fiber shaped complex is stable in the presence of excess colloids in the solution. As more DNA is added to the solution and the ratio between colloids and DNA approaches the fiber's stoichiometry, the system undergoes a sharp coagulation transition. The system is restabilized at even higher DNA concentrations through localization of small colloid clusters on extensive DNA networks.

引用

页码：1 / 088103

页数：4

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