EPR study of charge equilibrium at low temperatures in the S2 state of oxygen‐evolving photosystem II particles

FEBS Letters

Satoh, Jun-ichi¹  Inui, Takashi¹  Satoh, Kimiyuki²  Kawamori, Asako¹ 

[1] Faculty of Science, Kwansei Gakuin University, Nishinomiya 622 Japan;Department of Biology, Faculty of Science, Okayama University, Okayama 700, Japan

关键词: EPR signal IIs;    Decay kinetics;    Charge recombination;    Manganese multiline;    PS II particle;    Chl;    chlorophyll: DCMU;    3-(3;    4-dichlorophenyl)-1;    1-dimethylurea;    LHC;    light-harvesting complex;    PS II;    photosystem II;   

DOI  :  10.1016/0014-5793(87)81257-7

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The stability of EPR Signal II_s in oxygen-evolving PS II particles in the different S-states has been studied as a function of storage time at 77 K. Signal II_s in dark-adapted samples retains the same intensity after 1 month storage at 77 K, while that in the S₂ state produced by illumination at 195 K decays with a half-life time of about 5 days without decay in the manganese multiline intensity observed at 4.5 K. Signal II_s, once decayed in the S₂ state, recovers its original intensity upon dark adaptation of the sample at 210 K accompanied by a decrease in the multiline intensity. A model for the charge recombination process for the S₂ state involving Signal II_s is discussed.

【 授权许可】

Unknown