Identification of multiple components in the intermediary electron carrier complex of photosystem I

FEBS Letters

Evans, M.C.W.¹  Bonnerjea, J.¹ 

[1] Department of Botany and Microbiology, University College London, Gower Street, London WC1E 6BT, England

关键词: Photosystem I;    Electron acceptors;    Chlorophyll radicals;    Reaction centre;    Triplet;    Photosynthesis;    CIDEP;    chemically-induced dynamic electron polarisation;    EPR;    electron paramagnetic resonance;    ENDOR;    electron nuclear double resonance;   

DOI  :  10.1016/0014-5793(82)80831-4

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Illumination at 230 K of dithionite-reduced particles results in the appearance of an EPR detectable radical 13 G wide with g = 2.0033. This radical is formed in a ratio of 2.28 (±0.5)/P700. Investigation of the time course of formation shows two components are present. One (A ₁) has g = 2.0051 and the other (A _o g= 2.0024. Reduction of A ₁ results in an increase in reaction centre triplet formation, subsequent reduction of A _o results in a decrease of triplet formation to the base level. We propose that these components function sequentially in the transfer of electrons from P700 to the iron—sulphur acceptors.

【 授权许可】

Unknown