Lights, X-Rays, Oxygen!


Photosystem II uses metal ions to oxidize water to form O2. Two recent papers employ the new technique of serial femtosecond crystallography utilizing X-ray free-electron lasers and nanocrystals to obtain initial structures of intermediate states of photosystem II catalysis at the site of oxygen production. 
DOI: 10.1016/j.cell.2014.07.037


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