ORIENTATION OF XANTHOPHYLLS IN PHOSPHATIDYLCHOLINE MULTIBILAYERS

被引：84

作者：

GRUSZECKI, WI ^{[1
]}

SIELEWIESIUK, J ^{[1
]}

机构：

[1] MARIE CURIE SKLODOWSKA UNIV,INST PHYS,PLAC MARII CURIE SKLODOWSKIEJ 1,PL-20031 LUBLIN,POLAND

来源：

BIOCHIMICA ET BIOPHYSICA ACTA | 1990年 / 1023卷 / 03期

关键词：

Linear dichroism; Multibilayer; Phosphatidylcholine; Violaxanthin; X-ray diffraction; Zeaxanthin;

D O I：

10.1016/0005-2736(90)90133-9

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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°. 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 Å as compared with that of the pure DMPC bilayer. The observed nonzero linear dichroism at normal incidence of light suggests the possibility of nonhomogeneous orientation of transition dipoles in the plane of the bilayer. © 1990.

引用

页码：405 / 412

页数：8

共 18 条

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