Identification of FTIR bands due to internal water molecules around the quinone binding sites in the reaction center from Rhodobacter sphaeroides.

Abstract excerpt

The bacterial reaction center (RC) is a membrane protein complex that performs photosynthetic electron transfer from a bacteriochlorophyll dimer to quinone acceptors Q(A) and Q(B). Q(B) accepts electrons from the primary quinone, Q(A), in two sequential electron transfer reactions coupled to uptake of a proton from solution. It has been suggested that water molecules along the proton uptake pathway are protonated...

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