May act as a transporter of organic cations based on a proton efflux antiport mechanism. May play a role in the transport of chloroquine and quinidine-related compounds in kidney (PubMed:9744804). Plays a role in the regulation of lipid metabolism (By similarity). . This is the function of ENSG00000110628 (SLC67A1, solute carrier family 67 member 1).