Independent Initiation of Primary Electron Transfer in the Two Branches of the Photosystem I Reaction Center

Photosystem I (PSI) is a large pigment-protein complex that unites a reaction center (RC) at the core with ~100 core antenna chlorophylls surrounding it. The RC is composed of two cof actor branches related by a pseudo-C2 symmetry axis. The ultimate electron donor, P₇₀₀ (a pair of chlorophylls), and...

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