Expression of Ngb, Cygb and CA IX in human tumors. Tissue microarrays containing cores obtained from various human tumors were stained with to antibodies to Ngb, Cygb or CA IX. Positive staining was visualized by the chromogenic reaction of HRP with DAB. Photomicrographs were obtained at 20× magnification, and the scale bar indicates 50 μM. (A) ovarian carcinoma; (B) hepatocellular carcinoma; (C) breast infiltrating duct carcinoma.