Citation
Rm. Cinco et al., Proximity of calcium to the manganese cluster of the photosynthetic oxygen-evolving complex determined from strontium XAFS, J SYNCHROTR, 6, 1999, pp. 419-420
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF SYNCHROTRON RADIATION
ISSN journal
09090495
→ ACNP
Volume
6
Year of publication
1999
Part
3
Pages
419 - 420
Database
ISI
SICI code
0909-0495(19990501)6:<419:POCTTM>2.0.ZU;2-A
Abstract
Working on Photosystem II membranes from spinach, we substituted strontium
for calcium and probed using Sr EXAFS for any nearby Mn. Sr EXAFS results i
ndicate major differences between the functional (intact) and inactive (hyd
roxylamine-treated) samples. In intact samples, the Fourier transform of th
e Sr EXAFS shows a major peak that is missing in inactive samples. This int
eraction is best simulated by two Mn neighbors at a distance of similar to
3.5 Angstrom.