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Copper in photosystem II: association with LHC II

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Abstract

Photosystem II particles from spinach and barley contained 2.5 and 4.2 Cu per 300 chlorophylls respectively. This Cu was resistant to removal by EDTA. A large percentage of the PSII Cu in both plants is associated with the light-harvesting chlorophyll a/b protein, LHCII; 46% in barley and 76% in spinach. Several experiments have been performed to rule out the possibility that the Cu was introduced during the isolation procedures and to ensure that the Cu is associated with PSII. Since the PSII Cu is mainly associated with LHCII, it is unlikely that it is involved in O2 evolution.

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Abbreviations

BBY:

PSII particles prepared as in [4] with modifications

LHCII:

Light Harvesting Chlorophyll a/b protein

MMN:

50mM Mes-NaOH, 5 mM MgCl2, 15 mM NaCl

SOD:

Superoxide Dismutase

TEMED:

N,N,N′,N′-tetramethylethylenediamine

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Authors and Affiliations

  1. Botany Department, University of British Columbia, # 3529-6270 University Blvd., V6T 2B1, Vancouver, BC, Canada

    Peter R. Sibbald & Beverley R. Green

Authors
  1. Peter R. Sibbald
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  2. Beverley R. Green
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Additional information

Some of the results in this paper appeared in preliminary form in the Proceedings of the VIIth International Congress on Photosynthesis [24].

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Sibbald, P.R., Green, B.R. Copper in photosystem II: association with LHC II. Photosynth Res 14, 201–209 (1987). https://doi.org/10.1007/BF00032705

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  • DOI: https://doi.org/10.1007/BF00032705

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