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In plants and cyanobacteria, the primary step in oxygenic photosynthesis, the light induced charge separation, is driven by two large membrane intrinsic protein complexes, the photosystems I and II. Photosystem I catalyses the light driven electron transfer from plastocyanin/cytochrome c 6 on the lumenal side of the membrane to ferredoxin/flavodoxin at the stromal side by a chain of electron...
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