HEX expression and localization in normal tissues, breast carcinomas and cell lines. Immunohistochemical analysis was performed as described in the methods section. A and B: normal breast tissue. C: ductal carcinoma. D: lobular carcinoma. E: MCF-7 cells. F: T47D cells. G: HBL100 cells stained with p63 and CD10. H: HBL100 cells stained with HEX.