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Does the trimeric form of the Photosystem 1 reaction center of cyanobacteria in vivo exist?

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Abstract

When isolating Photosystem 1 from the thylakoid membranes of cyanobacteria, a multiplicity of photosystem complexes can be encountered, which has not yet been observed in any other phototrophic organisms: After solubilisation of thylakoid membranes with detergents, trimeric, dimeric and monomeric forms of Photosystem 1 can be separated. The question must now be answered, which of the stable Photosystem 1 forms is the functional form in vivo-monomeric or trimeric? The two possibilities are discussed, though we mainly present arguments for the existence of the trimeric form of Photosystem 1 in cyanobacterial thylakoid membranes.

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Abbreviations

CD:

circular dichroism

chl:

chlorophyll

DSP:

dithio-bis(succinimidyl propionate)

kDa:

kilodalton

Mr :

relative molecular weight

PPC:

pigment-protein complex

PS 1:

Photosystem 1

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Authors and Affiliations

  1. Department of Biochemistry, Faculty of Sciences, Charles University, Albertov 2030, 128 40, Prague 2, Czechoslovakia

    J. Hladík & D. Sofrová

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  1. J. Hladík
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  2. D. Sofrová
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Hladík, J., Sofrová, D. Does the trimeric form of the Photosystem 1 reaction center of cyanobacteria in vivo exist?. Photosynth Res 29, 171–175 (1991). https://doi.org/10.1007/BF00036220

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  • DOI: https://doi.org/10.1007/BF00036220

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