Activation energy of the rate constant of P+Q− A absorption decay in reaction centers fromRhodobacter sphaeroides reconstituted with different anthraquinones

FEBS Letters

Sebban, Pierre¹ 

[1] Laboratoire de Photosynthe`se du CNRS, ER 307, Bat. 24, CNRS, Gif-sur-Yvette 91190, France

关键词: Bacterial photosynthesis;    Reaction center;    Recombination kinetics;    Energetics;    Quinone;   

DOI  :  10.1016/0014-5793(88)80453-8

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The free energy differences between the first stable charge-separated state, P⁺Q⁻ _A and the thermally excited state, M, via which P⁺Q⁻ _A recombines, were measured in the reaction centers fromRhodobacter sphaeroides reconstituted with anthraquinones. We find that the free energy level of M is independent of the in situ redox potential of Q_A and consequently the free energy level of P⁺Q⁻ _A. This suggests that M is a state independent of P⁺Q⁻ _A. This is in support of the identification of M with a relaxed form of P⁺I⁻.

【 授权许可】

Unknown