E.s.r. signals of photosystem II after complete removal of manganese from the subchloroplast particles

S. I. Allakhverdiyev, V. V. Klimov, I. I. Proskuryakov

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Abstract

The authors have studied the effect of reversible extraction of Mn on the e.s.r. signal II belonging to the secondary electron donor (Z+) and the doublet e.s.r. signal of reduced pheophytin (pheoτ) and the plastquinone complex with iron (PCτ-Fe2+) in the oxygen evolving preparations of photosystem II (p.s. II). It is shown that after complete removal of Mn from the p.s. II preparations both the dark and photo-induced e.s.r. signal II and the doublet e.s.r. signal persist. It is concluded that Mn is not a component of the secondary electron donor Z of photosystem II and that its complete extraction does not disturb the exchange interaction between the anion radical pheoτ and the reduced complex PCτ-Fe2+.

Original languageEnglish
Pages (from-to)643-646
Number of pages4
JournalBiophysics
Volume33
Issue number4
Publication statusPublished - Dec 1 1988

ASJC Scopus subject areas

  • Biophysics

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    Allakhverdiyev, S. I., Klimov, V. V., & Proskuryakov, I. I. (1988). E.s.r. signals of photosystem II after complete removal of manganese from the subchloroplast particles. Biophysics, 33(4), 643-646.