In recent years, the ATP synthase (H+-ATPase, FoFrATPase) has been the subject of intensive IDvestigations in many laboratories. The major reason for this lies in the fact that this enzyme complex catalyses one of the most important reactions in living cells, namely the synthesis of ATP utilizing the energy from an electrochemical transmembrane H+ gradient, generated by the cellular respiratory chain or by the light reactions of photosynthetic organisms...