Order-disorder and the pretransition in dipalmitoyl phosphatidylcholine multilayers.
Order-disorder and the pretransition in dipalmitoyl phosphatidylcholine multilayers.
复制标题
二棕榈酰磷脂酰胆碱多层中的有序无序和预转变。
DOI：
10.1016/0006-291x(79)91494-3
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发表时间：
1979
影响因子：
3.1
通讯作者：
N. Spielberg
中科院分区：
文献类型：
--
作者：
W. Graddick;J. Stamatoff;P. Eisenberger;D. Berreman;N. Spielberg
使用 X 射线衍射，研究了过量溶液中钙离子与二棕榈酰磷脂酰胆碱 (DPPC) 多层的相互作用在一定浓度范围内作为温度的函数。我们发现有序-无序-有序转变是温度和钙浓度升高的函数。对于纯DPPC，预跃迁的特点是晶格无序度大幅增加。对于低钙浓度，所有温度下晶格畸变都会发生类似的增加。高温阶段的特点是这种疾病的显着减少。同样，在高钙浓度下，多层的有序性也会恢复。
Using x-ray diffraction, the interaction of calcium ions with dipalmitoyl phosphatidylcholine (DPPC) multilayers in excess solution has been studied as a function of temperature over a range of concentrations. We have discovered order-disorder-order transformations as a function of both increasing temperature and calcium concentration. For pure DPPC, the pretransition is characterized by a large increase in lattice disorder. For low calcium concentrations, a similar increase in lattice distortion occurs for all temperatures. The high temperature phase is marked by a significant reduction in this disorder. Likewise ordering of the multilayer is regained at high calcium concentrations.