Source:http://linkedlifedata.com/resource/umls/id/C0906368
NCI: The MRP1 Protein constitutes a multidrug resistance-associated plasma membrane drug-efflux pump, detectable in lung, testis, and peripheral blood mononuclear cells. This transporter protein is similar to ABC superfamily of transport systems and is over expressed in a multidrug-resistant SCLC cell line. (from OMIM 158343 and NCI)