Supramolecular chiral self-assembly and supercoiling behavior of carrageenans at varying salt conditions

被引：53
|
作者：
Schefer, Larissa [1 ]
Adamcik, Jozef [1 ]
Diener, Michael [1 ]
Mezzenga, Raffaele [1 ]
机构：
[1] ETH, Dept Hlth Sci & Technol, CH-8092 Zurich, Switzerland
来源：
NANOSCALE | 2015年 / 7卷 / 39期
基金：
瑞士国家科学基金会;
关键词：
ATOMIC-FORCE MICROSCOPY; KAPPA-CARRAGEENAN; IOTA-CARRAGEENAN; HELIX TRANSITION; DNA CONDENSATION; GELATION; POLYSACCHARIDES; CONFORMATION; DEPENDENCE; POTASSIUM;
D O I：
10.1039/c5nr04525h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The self-assembly of anionic kappa and iota carrageenan polysaccharides in the presence of NaCl, KCl and CaCl2 is studied by high-resolution atomic force microscopy (AFM). A hierarchical supramolecular chirality amplification over various length scales is observed upon the addition of KCl, whereas in the presence of NaCl and CaCl2 the chains undergo solely a coil-helix transition with stiff kappa carrageenan and more flexible iota carrageenan helical conformations.
引用
收藏
页码：16182 / 16188
页数：7
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