Bromide does not bind to the Mn4Ca complex in its S1 state in Cl(-)-depleted and Br(-)-reconstituted oxygen-evolving photosystem II: evidence from X-ray absorption spectroscopy at the Br K-edge.

@article{Haumann2006BromideDN,
  title={Bromide does not bind to the Mn4Ca complex in its S1 state in Cl(-)-depleted and Br(-)-reconstituted oxygen-evolving photosystem II: evidence from X-ray absorption spectroscopy at the Br K-edge.},
  author={Michael Haumann and Marcos Barra and Paola Loja and Simone L{\"o}scher and Roland Krivanek and Alexander Grundmeier and Lars-Erik Andr{\'e}asson and Holger Dau},
  journal={Biochemistry},
  year={2006},
  volume={45 43},
  pages={13101-7}
}
Chloride is an important cofactor in photosynthetic water oxidation. It can be replaced by bromide with retention of the oxygen-evolving activity of photosystem II (PSII). Binding of bromide to the Mn(4)Ca complex of PSII in its dark-stable S(1) state was studied by X-ray absorption spectroscopy (XAS) at the Br K-edge in Cl(-)-depleted and Br(-)-substituted PSII membrane particles from spinach. The XAS spectra exclude the presence of metal ions in the first and second coordination spheres of Br… CONTINUE READING

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