Figure 1.

Immunohistochemical analysis of MDR-1 P-gp and MRP-1 protein expression in RCC. (A) RCC tumour showing positive MDR-1 P-gp staining with strong MDR-1 positivity observed, score (4+3) (scale bar = 100 μm) and (B) MDR-1 P-gp positive RCC with moderate positivity observed, score (2+2) (scale bar = 100 μm) (C) MRP-1 positive tumour showing intense MRP-1 positive staining, score (4+3) (scale bar = 100 μm) and (D) MRP-1 positive RCC with moderate positivity observed, score (2+2) (scale bar = 100 μm). (Original magnifications of all photomicrographs ×40).