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Fotosystem II

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Fotosystem II

The last milliseconds on the photosynthetic water-oxidation clock The oxygen we breathe is produced by plants, algae and cyanobacteria, which capture sunlight to use its energy to drive the formation of oxygen by splitting water at a metal cluster in the enzyme Photosystem II. Now, scientists have managed to uncover the final, crucial steps in the catalytic mechanism that lead to the release of oxygen. Johannes Messinger Group
Illustration: Abuzer Orkun Aydin
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Illustration: Abuzer Orkun Aydin
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Uppsala University
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  • XFELs show the final milliseconds of oxygen formation

    XFELs show the final milliseconds of oxygen formation

    Using serial femtosecond crystallography performed with the XFEL technique, scientists have been able to see the crucial final step in the reaction cycle of Photosystem II, and managed to obtain more information on the interaction between Photosystem II and the Mn/Ca cluster. "Such a development is important for scaling up hydrogen production from water by sunlight or renewable electricity."