. "\"A proton-transporting two-sector ATPase complex found in the vacuolar membrane, where it acts as a proton pump to mediate acidification of the vacuolar lumen.\" [GOC:mah, ISBN:0716743663, PMID:16449553]" . . "vacuolar proton-transporting V-type ATPase complex" . "vacuolar hydrogen-translocating V-type ATPase complex" . "See also the cellular component terms 'vacuolar proton-transporting V-type ATPase, V1 domain ; GO:0000221' and 'vacuolar proton-transporting V-type ATPase, V0 domain ; GO:0000220' and the molecular function term 'hydrogen ion transporting ATPase activity, rotational mechanism ; GO:0046961'." . . .