Kinetics of EPR signal IIvf in chloroplast Photosystem II

Michael Boska, Kenneth Sauer

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


The risetime of EPR signal IIvf (S IIvf) has been measured in oxygen-evolving Photosystem II particles from spinach chloroplasts at pH 6.0. The EPR signal shows an instrument-limited rise upon induction (t 1 2 ≤ 3 μs). These data are consistent with a model where the species Z responsible for S IIvf is the immediate electron donor to P-680+ in spinach chloroplasts. A new, faster decay component of S IIvf has also been detected in these experiments.

Original languageEnglish (US)
Pages (from-to)84-87
Number of pages4
JournalBBA - Bioenergetics
Issue number1
StatePublished - Apr 26 1984


  • (Spinach chloroplast)
  • ESR
  • Electron transport
  • Photosystem II

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Cell Biology


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