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The formation of a transient complex between photosystem I and ferredoxin is involved in the process of ferredoxin photoreduction in oxygenic photosynthetic organisms. Reduced ferredoxin is an essential redox intermediate involved in many assimilatory processes and is necessary for the reduction of NADP+ to NADPH. Single crystals from a complex of photosystem I with ferredoxin were grown using PEG...
The structure of photosystem I from the thermophilic cyanobacterium Synechococcus elongatus has been recently resolved by x-ray crystallography to 2.5-Å resolution. Besides the reaction center, photosystem I consists also of a core antenna containing 90 chlorophyll and 22 carotenoid molecules. It is their function to harvest solar energy and to transfer this energy to the reaction center (RC) where...
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