Quadrupole parameters of nitrogen nuclei in the cation radical P.+ 700 determined by ESEEM of single crystals of photosystem I

H. Käß, Petra Fromme, W. Lubitz

Research output: Contribution to journalArticle

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Abstract

The cation radical of the primary donor P700 of photosystem I (PS I) is investigated by ESEEM on single crystals of PS I from the cyanobacterium Synechococcus elongatus. The nuclear quadrupole parameters Κ and η of five different 14N nuclei are determined and 14N hyperfine couplings (hfc's) of P.+ 700 are evaluated. For comparison the cation of methyl-chlorophyllide a is studied in frozen solution. The 14N hfc data agree with published results for the 15N-labeled cation radicals of P700 and chlorophyll a and are discussed in terms of a chlorophyll a dimer model for the cation radical P.+ 700.

Original languageEnglish (US)
Pages (from-to)197-206
Number of pages10
JournalChemical Physics Letters
Volume257
Issue number1-2
StatePublished - Jul 19 1996
Externally publishedYes

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Photosystem I Protein Complex
Cations
Nitrogen
quadrupoles
Single crystals
nitrogen
cations
nuclei
single crystals
chlorophylls
Dimers
dimers
chlorophyll P 700
chlorophyll a

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Quadrupole parameters of nitrogen nuclei in the cation radical P.+ 700 determined by ESEEM of single crystals of photosystem I. / Käß, H.; Fromme, Petra; Lubitz, W.

In: Chemical Physics Letters, Vol. 257, No. 1-2, 19.07.1996, p. 197-206.

Research output: Contribution to journalArticle

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