Time resolved EPR on photosystem II particles after irreversible and reversible inhibition of water cleavage with high concentrations of acetate
Authors:
- Christian H. BockCBChristian H. Bock
- Stephan GerkenSGStephan Gerken
- Dietmar StehlikDSDietmar Stehlik
- Horst T. WittHWHorst T. Witt
- 25 January 1988
- journal article
- Published by Wiley in FEBS Letters
- Vol. 227 (2) , 141-146
Abstract
Electron transfer in irreversibly acetate‐inhibited PS II preparations fromSynechococcusis investigated with EPR. A 1.4 mT wide EPR line with a decay rate consistent with the P+680Q−Aback reaction is tentatively assigned to be a broadened P+680spectrum. With reversible inhibition of water cleavage by the ADRY reagent FCCP added with acetate electron transfer is studied as well. Under these conditions the spectrum of the immediate donor to P+680is the same as the spectrum of Z+in systems with irreversibly inhibited water cleavage (signal II fast) and the same as that of D+(signal II slow). The consequences are discussed.Keywords
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