Expression of Ngb, Cygb and CA IX in human normal tissues. Tissue microarrays containing cores obtained from various human normal tissues 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) stomach (fundus); (B) small bowel; (C) gallbladder.