. "\"A protein complex that forms part of a proton-transporting two-sector ATPase complex and carries out proton transport across a membrane. The proton-transporting domain (F0, V0, or A0) includes integral and peripheral membrane proteins.\" [GOC:mah, PMID:10838056]" . . "proton-transporting two-sector ATPase complex, proton-transporting domain" . . .