Magnetic-field-induced orientation of photosynthetic reaction centers as revealed by time-resolved W-band EPR of spin-correlated radical pairs

被引：23

作者：

Berthold, T

Bechtold, M

Heinen, U

Link, G

Poluektov, O

Utschig, L

Tang, J

Thurnauer, MC

Kothe, G

机构：

[1] Univ Freiburg, Dept Chem Phys, D-79104 Freiburg, Germany

[2] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 49期

关键词：

D O I：

10.1021/jp992011o

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The spin-polarized W-band EPR spectra of the secondary radical pair in plant photosystem I indicate a magnetic-field-induced orientation of the photosynthetic reaction centers in the field of the EPR spectrometer. This orientation arises due to the anisotropy of the diamagnetic susceptibility of the reaction center protein. Analysis of the angular-dependent EPR spectra on the basis of the spin-correlated radical pair concept provides new information on the cofactor arrangement in plant photosystem I.

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页码：10733 / 10736

页数：4

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