Description
ABCG2 (ATP-binding cassette, subfamily G, member 2) also known as ABCP, BCRP (Breast cancer resistance protein) or MRX (Mitoxantrone resistance-associated protein), is a protein that in humans is encoded by the ABCG2 gene. The gene encodes a membrane transporter belonging to the ATP-binding cassette (ABC) superfamily of membrane transporters, which are involved in the trafficking of biologic molecules across cell membranes.The protein is also a high capacity transporter for uric acid excretion in the kidney, liver, and gut. In vitro assays of isolated membrane preparations revealed a high-capacity, vanadate-sensitive ATPase activity associated with ABCG2 expression that was stimulated by compounds known to be transported by this protein