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Abstract:
The H+-translocating ATPase (“ATP-synthase”) from chloroplasts is a membrane-bound enzyme which can couple a transmembrane proton transport with ATP synthesis/hydrolysis. The enzyme has a hydrophobic, membrane-integrated part, CF0, which is supposed to act as a proton channel through the membrane and a hydrophilic part, CF1 which contains the nucleotide-binding sites. The CF2 part contains five different subunits with the stoichiometry α3β3γδε, the CFo part contains four different subunits with the stoichiometry I, II, III12, IV However, there is no general agreement about the subunit stoichiometry up to now.