Impedance analysis of a phosphatidylcholine-phosphatidylethanolamine system in bilayer lipid membranes

被引：21
|
作者：
Naumowicz, Monika
Petelska, Aneta Dorota
Figaszewski, Zbigniew Artur
机构：
[1] Univ Bialystok, Inst Chem, PL-15443 Bialystok, Poland
[2] Univ Warsaw, Fac Chem, Lab Electrochem Power Sources, PL-02093 Warsaw, Poland
来源：
ELECTROCHIMICA ACTA | 2006年 / 51卷 / 24期
关键词：
impedance spectroscopy; phosphatidylcholine; phosphatidylethanolamine; complex 1 : 1;
D O I：
10.1016/j.electacta.2006.03.038
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Electrochemical impedance spectroscopy was used for the study of two-component lipid membranes. Phosphatidylcholine (PC) and phosphatidylethanolamine (PE) were to be investigated, because of their presence in biological membranes. Capacitance values of pure components are 0.62 and 0.32 mu F cm(-2), respectively. The 1: 1 complex was formed during formation of the PC-PE lipid membrane. Formation of the complex can explain the deviation from the additivity rule. This equilibrium was described by mathematical equations and was further verified experimentally. Adequate equations let us calculate such parameters as: capacitance of the complex molecule, area occupied by the complex molecule as well as the stability constant of the complex. (c) 2006 Elsevier Ltd. All rights reserved.
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页码：5024 / 5028
页数：5
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