The yeast vacuolar proton-translocating ATPase (V-ATPase) is the best characterised member of the V-ATPase family. A total of thirteen genes are required for encoding the subunits of the enzyme complex itself and an additional three for providing factors necessary for the assembly of the whole. Vma12 is one of these latter, all three of which are localised to the endoplasmic reticulum [1].

1: Assembly of the yeast vacuolar proton-translocating ATPase. Graham LA, Stevens TH; J Bioenerg Biomembr. 1999;31:39-47. PMID:10340847