CHARACTERIZATION OF THE MN SITE IN THE PHOTOSYNTHETIC OXYGEN-EVOLVINGCOMPLEX - THE EFFECT OF HYDROXYLAMINE AND HYDROQUINONE ON THE X-RAY-ABSORPTION SPECTRA

Authors
RIGGS PJ MEI R YOCUM CF PENNERHAHN JE
Citation
Pj. Riggs et al., CHARACTERIZATION OF THE MN SITE IN THE PHOTOSYNTHETIC OXYGEN-EVOLVINGCOMPLEX - THE EFFECT OF HYDROXYLAMINE AND HYDROQUINONE ON THE X-RAY-ABSORPTION SPECTRA, JPN J A P 1, 32, 1993, pp. 527-529
Citations number
16
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS → ACNP
Volume
32
Year of publication
1993
Supplement
32-2
Pages
527 - 529
Database
ISI
SICI code
Abstract
X-ray absorption spectroscopy has been used to characterize the Mn sit e in the photosynthetic oxygen evolving complex (OEC) reaction center core complex. Treatment in the dark with hydroxylamine or with dihydro quinone results in a shift of the XANES spectra to lower energy, consi stent with reduction at the Mn site. Structural changes are seen in th e EXAFS as well. In both cases, the structural changes are completely reversible on illumination.