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Evidence for localisation of accumulated chlorophyll cation on the D1-accessory chlorophyll in the reaction centre of Photosystem II

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Abstract

Absorption and circular dichroism spectra of Photosystem II (PS II) reaction centres (RC) were studied and compared with spectra calculated on the basis of point-dipole approximation. Chlorophyll cation was accumulated during a light treatment of PS II RC in the presence of artificial electron acceptor silicomolybdate. Light-induced difference spectra and their calculated counterparts revealed the location of accumulated cation at the accessory chlorophyll of the D1 protein subunit.

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Abbreviations

CD:

circular dichroism

Chl:

chlorophyll

D1:

psbA gene product

D2:

psbD gene product

DM:

n-dodecyl-β-D-maltoside

FWHM:

full-width at half maximum

MES:

morpholinethanesulfonic acid

Pheo:

pheophytin

PS II:

Photosystem II

RC:

reaction centre

SiMo:

silicomolibdic acid

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Correspondence to Frantisek Vacha.

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Vacha, F., Psencik, J., Kuty, M. et al. Evidence for localisation of accumulated chlorophyll cation on the D1-accessory chlorophyll in the reaction centre of Photosystem II. Photosynth Res 84, 297–302 (2005). https://doi.org/10.1007/s11120-004-6817-2

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  • DOI: https://doi.org/10.1007/s11120-004-6817-2

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