Expression of HNF-1β in extrarenal tissues. Anti-HNF-1β antibody staining of adult wild-type mouse tissues showed expression of HNF-1β in the nuclei of epithelial cells in the pancreatic ducts (A), intrahepatic bile ducts (B), bladder (C), seminal vesicles (D), epididymis (E), vas deferens (F), prostate (G and H), and urethra (I). Scale bars = 10 μm.