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. 2010 Mar 16;102(7):1157–1162. doi: 10.1038/sj.bjc.6605590

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Copyright © 2010 Cancer Research UK

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Immunohistochemical analysis of MDR1/P-gp and MRP-1 protein expression. Representative melanoma specimens showing strongly positive (4+3) MDR1/P-gp (A) and MRP-1 (B) staining (4+3). Images (C) and (D) show specimens that were negative for MDR1/P-gp and MRP-1 staining, respectively. Image (E) represents negative control (scale bar=100 μm in all images; original magnifications of all photomicrographs × 40).