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The structure of photosystem I

The high resolution structure of photsystem I reveals an asymmetry in the organization of its cofactors that has ramifications for the path of electron flow.

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Figure 1: A schematic diagram of the electron-proton transport chain of oxygenic photosynthesis.
Figure 2: A comparison of α-helical organization of the PsaA–PsaB heterodimer of PSI and those of the CP43–D1 and CP47–D2 proteins of PSII, as viewed from the stroma.

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Barber, J. The structure of photosystem I. Nat Struct Mol Biol 8, 577–579 (2001). https://doi.org/10.1038/89597

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