Reduction kinetics of the photo‐oxidized chlorophyll a + II in the nanosecond range

FEBS Letters

Eckert, H.-J.¹  Renger, G.¹  Witt, H.T.¹ 

[1] Max-Volmer Institut für Biophysikalische und Physikalische Chemie der Technischen Universität, Strasse des 17. Juni 135, D 1000 Berlin 12, Germany

关键词: Photosystem II;    Chlorophyll a II;    Electron transfer;    Reaction center;   

DOI  :  10.1016/0014-5793(84)80149-0

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The 688 nm absorption changes (ΔA ₆₈₈), indicating the photochemical turnover of chlorophyll a _II (Chl a _II) have been investigated under repetitive laser flash excitation conditions in spinach chlorplasts. It was found that under steady state conditions about 50–60% of the photo-oxidized primary donor of Photosystem II (PS II), Chl a ⁺ _II, becomes re-reduced with a biphasic kinetics in the nanosecond time scale with half-life times of about 50 ns and 400 ns. The remaining Chl a ⁺ _II becomes re-reduced in the microsecond range.

【 授权许可】

Unknown