第 期 祝泽栋等 三氯六氨络合钴对 凝聚及解凝聚的影响
2 : DNA 1 29
Effect of hexamine cobalt III on DNA condensation
( )
and decondensation
∗
ZHU Ze ̄dongꎬ HE Jia ̄qiꎬXI Liang ̄yanꎬXU Zi ̄yanꎬ WANG Yan ̄wei
(College of Mathematicsꎬ Physics and Electronic Information Engineeringꎬ Wenzhou Universityꎬ
Wenzhou Zhejiang 325035ꎬ China)
Abstract
The change of multivalent ion concentration has a certain effect on DNA condensation and decondensation. In this paperꎬ
the effects of hexamine cobalt (III) concentration on the DNA condensation morphology and critical condensing force were studied by
the single molecule magnetic tweezers and atomic force microscopy. It was found that with the increase of the concentration of trivalent
ionsꎬ the DNA condensation degree and critical force increased. But when the concentration reached a certain valueꎬ with the increase
of the concentration of trivalent ionsꎬ the condensation
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