Low-temperature spectroscopy of fully active cores. Comparison with CP43, CP47,

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Comparisons of absorption spectra of photosystem II (PSII) core complexes with those of isolated CP43, CP47 and D1/D2/cyt b559 complexes show broadenings and shifts upon disassembly of the PSII core material. Spectra of PSII cores isolated from plants and cyanobacteria reveal marked changes in energies and intensities of the sharp features associated with P680. Low-temperature, illumination-induced electrochromic shifts in PSII cores allow identification of an excitation localized on pheopytin-a (pheo a) in D1. A weak interaction between an exciton component of P680 and the D1 pheo a, both located near 684 nm, is suggested. MCD spectra of 5- and 6-chlorophyll a D1/D2/cytochrome b559 preparations provide links to photoactive pigments in intact PSII cores.


  • Sindra Peterson Årsköld
  • Barry J Prince
  • Elmars Krausz
  • Paul Smith
  • Ron J Pace
  • Rafael Picorel
  • Mikael Seibert
Enheter & grupper

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Biologiska vetenskaper


Sidor (från-till)97-100
TidskriftJournal of Luminescence
Utgåva nummer1-4
StatusPublished - 2004
Peer review utfördJa