几种磷脂双层横向压缩性的测量。
Measurement of the lateral compressibility of several phospholipid bilayers.
作者信息
Lis L J, McAlister M, Fuller N, Rand R P, Parsegian V A
出版信息
Biophys J. 1982 Mar;37(3):667-72.
Abstract
Lateral compressibilities of bilayers in multilayer lattices are given for 10 phospholipid preparation:dilauryl-, dimyristoyl-, dipalmitoyl-, distearoyl-, and dioleoylphosphatidylcholine (PC); egg phosphatidylethanolamine (PE); as well as cholesterol-containing bilayers of dipalmitoyl PC or of egg PC. Bilayer deformability is highly nonlinear and does not permit description in terms of a simple modulus. The presence of cholesterol or C=C bonds (dioleoyl PC) increases deformability, but freezing of acyl chains does not cause dramatic stiffening of the bilayer. Lateral compression of dilauryl PC an dimyristoyl PC causes a transition from "melted" to "frozen" acyl chains above the normal transition temperatures. Our measurements do not correspond in any obvious way to lateral compressibilities in monolayers at the air-water interface.
摘要
给出了10种磷脂制剂在多层晶格中双层膜的横向压缩率：二月桂酰、二肉豆蔻酰、二棕榈酰、二硬脂酰和二油酰磷脂酰胆碱（PC）；鸡蛋磷脂酰乙醇胺（PE）；以及含胆固醇的二棕榈酰PC或鸡蛋PC双层膜。双层膜的可变形性高度非线性，无法用简单的模量来描述。胆固醇或碳碳双键（二油酰PC）的存在会增加可变形性，但酰基链的冻结不会导致双层膜显著变硬。在正常转变温度以上，二月桂酰PC和二肉豆蔻酰PC的横向压缩会导致酰基链从“熔化”状态转变为“冻结”状态。我们的测量结果与气-水界面单层膜的横向压缩率没有任何明显的对应关系。
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