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The EPR spectrum of the triplet state of photosystem II reaction centers has been studied in the case of the singly reduced primary acceptor complex QAFe2+. It was demonstrated that the shape of the spectrum does not change much when the relaxation of the primary acceptor is accelerated and when magnetic interaction between the reduced quinone molecule QA and the non-heme iron Fe2+ is disrupted. This observation confirms the earlier conclusion that the anomalous shape of the EPR spectrum is due mainly to the anisotropy of the quatum yield of the triplet state. A scheme of primary events in photosystem II is discussed, which is consistent with the observed properties of the EPR spectrum of the triplet state.
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I I Proskuriakov
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I B Kleninina, and
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I B Kleninina, and
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I B Kleninina, and
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I B Kleninina, and
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I I Proskuriakov
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I B Kleninina, and
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M G Zvereva, and
I I Proskuriakov
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I B Kleninina, and
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M G Zvereva, and
I I Proskuriakov
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