Fig. 1.

Prostate stem cell antigen (PSCA) is expressed in the islet of human normal pancreas (immunohistochemistry). (A) Double staining with anti-PSCA (blue) and anti-proliferating cell nuclear (brown) antibodies. The right panel is magnification of the islet shown in the left column. (B) Fluorescent double staining of anti-PSCA antibody (red) and four islet-cell markers (blue), insulin (β cell), glucagon (α cell), somatostatin (δ cell) or pancreatic polypeptide (PP cell). Each series of the image was obtained by focusing on the islet-cell markers.