title: [ESR signals of photosystem II after complete removal of manganese from pea subchloroplast particles].
abstract: The effect of reversible extraction of Mn on ESR signal II arising from the oxidized secondary electron donor (Z+) and the ESR doublet signal related to reduced spin-coupled pheophytin (pheo -) and "primary" electron acceptor (PA- -Fe (2+)) has been studied in oxygen evolving preparations of the photosystem 2. It is demonstrated that Mn extraction does not affect both dark and photoinduced ESR signal II and ESR doublet. A conclusion is made that Mn is not a component of the secondary electron donor Z of the Photosystem 2 and its complete removal has no effect on the exchange interaction of Pheo(-) and the PQ(-) -Fe(2+) complex.
authors.forename: S I
authors.initials: SI
authors.lastname: Allakhverdiev
authors.forename: V V
authors.initials: VV
authors.lastname: Klimov
authors.forename: I I
authors.initials: II
authors.lastname: Proskuriakov
mesh_terms: D002734:Chlorophyll / Q000378:metabolism; D002736:Chloroplasts / Q000378:metabolism* / Q000648:ultrastructure; D004578:Electron Spin Resonance Spectroscopy; D008345:Manganese / Q000378:metabolism*; D018532:Pisum sativum / Q000378:metabolism*; D010674:Pheophytins / Q000378:metabolism; D055668:Photochemical Processes; D045332:Photosystem II Protein Complex / Q000378:metabolism*
chemical_list: D010674:Pheophytins; D045332:Photosystem II Protein Complex; D002734:Chlorophyll; D008345:Manganese