Electron Transfer in Rhodopseudomonas Viridis Reaction Centers with Prereduced Bacteriopheophytin BL
Bacterial reaction centers (RCs) contain three protein subunits (L, M and H), four bacteriochlorophylls (BChl), two bacteriopheophytins (H), two quinones (Q) and one atom of Fe . Accordingly to spectral properties  and X-ray analysis  two BChls form a dimer, primary electron donor P. Two other BChls (B) and two H form two transmembrane cofactor chains located in L and M protein subunits and terminated by two Qs: P-BL-HL-QA and P-BM-HM-QB . Only LA-chain is photochemically active. The excited state P* within 3–4 ps at 293K transfers an electron to (BLHL) acceptor complex [4–6]. An electron is further transfered to QA within 200 ps.
KeywordsExcitation Energy Transfer Primary Electron Donor Bacterial Reaction Center Recombination Luminescence Neutral Acceptor
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