This gene is a member of the superfamily of ATP-binding cassette (ABC) transporters and the encoded protein contains two ATP-binding domains and 12 transmembrane regions. ABC proteins transport various molecules across extra- and intracellular membranes. ABC genes are divided into seven distinct subfamilies: ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, and White. This gene is a member of the MRP subfamily which is involved in multi-drug resistance. This gene and another subfamily member are arranged head-to-tail on chromosome 16q12.1. Increased expression of this gene is associated with breast cancer.[7] Loss of function is implicated in hereditary cholestasis.
^Tammur J, Prades C, Arnould I, Rzhetsky A, Hutchinson A, Adachi M, et al. (Aug 2001). "Two new genes from the human ATP-binding cassette transporter superfamily, ABCC11 and ABCC12, tandemly duplicated on chromosome 16q12". Gene. 273 (1): 89–96. doi:10.1016/S0378-1119(01)00572-8. PMID11483364.