Efflux carrier for plant-derived alkaloids, antibiotics, heavy metal and other toxic compounds. Involved in cadmium detoxification. Requires probably a proton-motive force for the efflux. Ubiquitous. Highest expression in flowers and stems. Belongs to the multi antimicrobial extrusion (MATE) (TC 2.A.66.1) family. Mistakenly referred to as AT2G04070 in PubMed:11739388.