PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19448082-8 2009 The primary transport system driving base secretion into the lumen appears to be a bafilomycin-A(1)-sensitive, electrogenic H(+) V-ATPase located on the basal membrane, which extrudes acid into the haemolymph, as inferred from the extracellular pH gradients detected adjacent to the basal membrane. bafilomycin A1 83-99 Vacuolar H[+]-ATPase 55kD subunit Drosophila melanogaster 129-137