Figure 1

ABCG2 ⁺ cells in the prostate epithelium. Serial sections of normal human prostate were stained for ABCG2 (A – C) or CD138 (D – F). A subpopulation of cells in the basal epithelium is ABCG2⁺. Endothelial cells of capillaries (black arrow) are also ABCG2⁺ but are CD138^- (red arrow). All basal cells of a particular small gland were ABCG2⁺/CD138⁺ (B). Original magnification is 100×, magnification for C and F is 200×.