该基因编码的蛋白是ATP结合盒（ABC）转运蛋白的超家族成员。ABC蛋白通过细胞外膜和细胞内膜转运各种分子。ABC基因被分为7个不同的亚家族（abc1、mdr/tap、mrp、ald、oabp、gcn20和white）。这种ABC全转运体是MRP亚家族的一员，涉及多药耐药。已发现编码该基因不同亚型的多种转录变体。
The protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, and White). This ABC full-transporter is a member of the MRP subfamily which is involved in multi-drug resistance. Multiple transcript variants encoding different isoforms have been found for this gene.