[Vliianie ékstragirovaniia i posleduiushchego dobavleniia ionov margantsa na fotookislenie khlorofilla P(680) v preparatakh fotosistemy II]

Translated title of the contribution: [Effect of extraction and subsequent addition of manganese ions on photooxidation of chlorophyll P(680) in the photosystem 2 preparations].

S. I. Allakhverdiev, M. A. Shafiev, V. V. Klimov

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Effect of reversible removal of Mn on the amplitude of photoinduced absorbance changes (ΔA) related to photooxidation of chlorophyll P(680) in pea oxygen -- evolving photosystem 2 (PS(2)) preparations has been studies. It is shown that after complete removal of Mn the amplitude of ΔA is increased by a factor of 7--8 and it is decreased again to the initial value upon subsequent addition of MnCl(2). This reactivation needs four Mn atoms per one reaction centre (RC) of PS(2). In the presence of 3 μM MgCI(2) the reactivation requires two Mn atoms per RC of PS2. The obtained data confirm our earlier conclusion that a four-atomic Mn centre functions in the donor side of PS(2); two of them can be replaced by either Mg(2+) or other divalent metals.

    Translated title of the contribution[Effect of extraction and subsequent addition of manganese ions on photooxidation of chlorophyll P(680) in the photosystem 2 preparations].
    Original languageRussian
    Pages (from-to)223-226
    Number of pages4
    JournalBiofizika
    Volume31
    Issue number2
    Publication statusPublished - Mar 1 1986

    ASJC Scopus subject areas

    • Medicine(all)

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