Surface Complexation of DNA with Insoluble Monolayers. Influence of Divalent Counterions
نویسندگان
چکیده
منابع مشابه
Surface complexation of DNA with insoluble monolayers. Influence of divalent counterions.
DNA interacts with insoluble monolayers made of cationic amphiphiles as well as with monolayers of zwitterionic lipids in the presence of divalent ions. Binding to dioctadecyldimethylammonium bromide (DODAB) or distearoyl-sn-glycero-3-phosphocholine (DSPC) monolayers in the presence of calcium is accompanied by monolayer expansion. For the positively charged DODAB monolayer, this causes a decre...
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Strongly correlated electrostatics of DNA systems has drawn the interest of many groups, especially the condensation and overcharging of DNA by multivalent counterions. By adding counterions of different valencies and shapes, one can enhance or reduce DNA overcharging. In this paper, we focus on the effect of multivalent co-ions, specifically divalent co-ions such as SO[Formula: see text]. A co...
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We study a simple model of DNA divalent cationic surfactant complexation. We find that the combination of electrostatic and hydrophobic effects leads to a cooperative phenomenon in which as the amphiphile is added to the solution containing DNA, a large fraction of the DNA’s charge is neutralized by the condensed divalent cationic surfactants, forming the surfoplex. This binding transition occu...
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ژورنال
عنوان ژورنال: Langmuir
سال: 2005
ISSN: 0743-7463,1520-5827
DOI: 10.1021/la047700s