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Two Interconvertible Structures that Explain the Spectroscopic Properties of the Oxygen‐Evolving Complex of Photosystem II in the S2 State

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Pantazis,  Dimitrios A.
Research Department Neese, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Ames,  William
Research Department Neese, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Cox,  Nicholas
Research Department Lubitz, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Lubitz,  Wolfgang
Research Department Lubitz, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Neese,  Frank
Research Department Neese, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Citation

Pantazis, D. A., Ames, W., Cox, N., Lubitz, W., & Neese, F. (2012). Two Interconvertible Structures that Explain the Spectroscopic Properties of the Oxygen‐Evolving Complex of Photosystem II in the S2 State. Angewandte Chemie International Edition, 51(39), 9935-9940. doi:10.1002/anie.201204705.


Cite as: http://hdl.handle.net/21.11116/0000-0007-3FE8-E
Abstract
Using models derived from the X‐ray structure of photosystem II, it is shown that the oxygen evolving complex in the S2 state exists in two energetically similar and interconvertible forms. A longstanding question regarding the spectroscopy of the catalyst is thus answered: one form corresponds to the multiline g=2.0 EPR signal (see picture, right; O red, Mn purple, Ca yellow), and the other to the g≥4.1 signals (left).