Journal
COORDINATION CHEMISTRY REVIEWS
Volume 252, Issue 3-4, Pages 259-272Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ccr.2007.07.016
Keywords
photosystem II; chlorophyll; photochemistry; energetics; water oxidation
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The recent availability of X-ray crystallographic structures of Photosystem II (PSII) together with refined steady-state and time-resolved spectroscopic analyses of site-directed mutants, are leading to a more detailed understanding of the function of this photosystem. Recent data have significantly modified the energetic picture of Photosystem II: the midpoint potentials of the first redox carriers in the chain leading to water-splitting have been reevaluated, the free-energy changes associated with the subsequent electron/proton transfer steps have been estimated and, last but not least, the free-energy landscape of the water-splitting reaction is starting to emerge with the identification of reaction intermediates and the free-energy chances associated with the formation of these transient species. (c) 2007 Elsevier B.V. All rights reserved.
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