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In bacterial photosynthesis it has been proposed that an electron is transferred from the excited singlet state (P*) of theprimary electron donor first to a bacteriochlorophyll (BChl) molecule, generating a P + Chl charge-transfer state, and that BChl - subsequently (4-7 ps) transfers an electron to a bacteriopheophytin molecule. Here we review the evidence for and against the intermediacy...
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