Na+ more strongly inhibits DNA compaction by spermidine (3+) than K+

被引：24

作者：

Hibino, Kumiko

Yoshikawa, Yuko

Murata, Shizuaki

Saito, Takuya

Zinchenko, Anatoly A. ^{[1
]}

Yoshikawa, Kenichi

机构：

[1] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[2] Nagoya Bunri Coll, Dept Food & Nutr, Nagoya, Aichi 4510077, Japan

[3] Nagoya Univ, Grad Sch Environm Studies, Sch Informat & Sci, Nagoya, Aichi 4648601, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 426卷 / 4-6期

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/j.cplett.2006.05.120

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The protective effects of alkali metal ions (Li+, Na+, K+, Rb+ and Cs+) against spermidine-induced DNA compaction were studied using single-molecule observations. We found that all alkali metal salts prevent DNA compaction, where Na+ more strongly prevented DNA compaction than other alkali metal ions. We discuss our results in terms of changes in ionic radii in relation to the net translational entropy of small ions due to ionic exchange between trivalent and monovalent cations. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：405 / 409

页数：5

共 35 条

[1] SUPERCOILING IN CLOSED CIRCULAR DNA - DEPENDENCE UPON ION TYPE AND CONCENTRATION [J].