Fig. 5. Schematic P representation of an artificial pl hotosynthetic membrane The ADP lipid bilayer of a liposome vesicle contains the components of a light-driven proton pump: a vectorially inserted triad leads to transport of hydrogen ions into the liposome interior, establishing a proton motive force. The membrane also contains a vectorially inserted aTP synthase enzyme. H The flow of protons out of the liposome through this enzyme drives the production ofATP.Fig. 5. Schematic representation of an artificial photosynthetic membrane. The lipid bilayer of a liposome vesicle contains the components of a light-driven proton pump: a vectorially inserted triad leads to transport of hydrogen ions into the liposome interior,establishing a proton motive force. The membrane also contains a vectorially inserted ATP synthase enzyme. The flow of protons out of the liposome through this enzyme drives the production of ATP