ORIENTATIONS OF TRANSITION MOMENTS IN REACTION CENTERS OF RHODOPSEUDOMONAS-SPHAEROIDES, COMPUTED FROM DATA OF LINEAR DICHROISM AND PHOTOSELECTION MEASUREMENTS

被引：19

作者：

CLAYTON, RK ^{[1
]}

RAFFERTY, CN ^{[1
]}

VERMEGLIO, A ^{[1
]}

机构：

[1] CEN SACLAY,DEPT BIOL,SERV BIOPHYS,F-911990 GIF SUR YVETTE,FRANCE

来源：

BIOCHIMICA ET BIOPHYSICA ACTA | 1979年 / 545卷 / 01期

基金：

美国国家科学基金会;

关键词：

(Rhodopseudomonas sphaeroides); Bacteriochlorophyll; Bacteriopheophytin; Linear dichroism; Reaction center; Transition moment;

D O I：

10.1016/0005-2728(79)90113-0

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：

Linear dichroism measurements of reaction centers of Rhodopseudomonas sphaeroides in stretched gelatin films have yielded angles that various optical transition moments make with an axis of symmetry in the reaction center. Photoselection experiments have yielded angles that certain transition moments make with each other. We have combined these data so as to compute the orientations of the Qx and Qy transition moments of the two molecules of bacteriopheophytin and of the bacteriochlorophyll special pair (photochemical electron donor) in the reaction center. Orientations are expressed in spherical polar coordinates with the symmetry axis as the pole. We have also computed additional angles between pairs of transition moments. In this treatment we have assumed that the bacteriopheophytins are independent monomers with little or no exciton coupling. © 1979.

引用

页码：58 / 68

页数：11

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