Vacuolar membrane transporter for arginine; involved in vacuolar export of arginine under nitrogen starvation conditions and for rapid exchange between the vacuole and cytosol during active growth; contributes to amino acid homeostasis; vacuolar membrane protein; member of the PQ-loop family, containing seven transmembrane domains; homologous to the human lysosomal cationic amino acid exporter PQLC2; null mutant is functionally complemented by the rat PQLC2 vacuolar transporter