... a concentration gradient so as to accumulate inside the energized organelles. Essentially the same transport process takes place in liposomes that have been reconstituted with purified V-or F-ATPase. Various hydrophobic cations are also accumulated in mitochondria by a similar mechanism. The energy-dependent...

... for the proton pumping activity is similar in the two families. However, whereas F-ATPases can act in both proton pumping and ATP formation, the V-ATPases of eukaryotes function exclusively as ATP-dependent proton pumps. The catalytic and membrane sectors of F-ATPases and archaebacterial V-ATPases can separately...

...Wolfgang Junge; Siegfried Engelbrecht; Cord Griwatz; Georg Groth ABSTRACT This article reviews proton intake, charge transfer and proton release by F-ATPases, based in part on flash spectrophotometric studies on the chloroplast ATPase in thylakoid membranes, CF 1 F 0 . The synthesis-coupled...