ORIENTATION OF XANTHOPHYLLS IN PHOSPHATIDYLCHOLINE MULTIBILAYERS
ORIENTATION OF XANTHOPHYLLS IN PHOSPHATIDYLCHOLINE MULTIBILAYERS
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DOI：
10.1016/0005-2736(90)90133-9
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发表时间：
1990-04-30
期刊：
影响因子：
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通讯作者：
SIELEWIESIUK, J
中科院分区：
文献类型：
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作者：
GRUSZECKI, WI;SIELEWIESIUK, J
用X射线衍射和线性二色性研究了紫黄质和玉米黄质修饰的二肉豆蔻酰磷脂酰胆碱（DMPC）的取向多层膜。看起来颜料分子和双层平面的法线形成24.25 °的角。还观察到，相当小浓度的添加的叶黄素（摩尔分数高达3%）使色素双层厚度增加了约2埃的值。与纯DMPC双层膜相比，在垂直入射光下观察到的非零线性二向色性表明了过渡偶极子在双层平面上非均匀取向的可能性。
Oriented multibilayers of dimyristoyl phosphatidylcholine (DMPC) modified with violaxanthin or zeaxanthin were examined by X-ray diffractometry and linear dichroism. It appears that pigment molecules and the normal to the bilayer plane form an angle of 24.25.degree.. It was also observed that rather small concentrations of added xanthophylls (molar fraction up to 3%) increase the pigmented bilayer thickness by a value of about 2 .ANG. as compared with that of the pure DMPC bilayer. The observed nonzero linear dichroism at normal incidence of light suggest that possibility of nonhomogeneous orientation of transition dipoles in the plane of the bilayer.