Map 4-Antibodies

P-Glycoprotein (mdr 1 gene product)

Clone & Isotype Conjugate Size Format Part Number

UIC2 Purified 0.1 mg Freeze-dried IM1873
IgG2a (mouse) Purified 100 tests Liquid IM1864


The UIC2 antibody reacts with an external epitope of the human P-glycoprotein (P-gp), a 170-180 kDa Multi-Drug Resistance (MDR) gene product. This protein carries out ATP-dependent efflux of structurally diverse lipophilic compounds, including many anti-cancer chemotherapy agents. In hematopoietic cells, the mdr1 gene product is expressed, but at relatively low levels. P-gp is expressed in specialized epithelial cells with secretory or excretory functions. In the liver, P-gp is found on the biliary surface of hepatocytes and small biliary ductules; in the pancreas, on the laminal surface of epithelial cells of small ductules and, in the kidney, on the brush border of the proximal tubules. Additional sites of expression include the gastrointestinal tract, endothelial cells of the brain and the adrenal glands. UIC2 antibody inhibits Pgp-mediated efflux and potentiates the cytotoxic action of P-gp transported drugs in MDR cells. It is suitable for flow cytometry, immunoblotting and immunohistochemistry on cryostat or paraffin embedded tissue sections.

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