Figure 2

Representative immunohistochemical staining for derlin-1 protein in normal human mammary glands and breast cancer tissues. (a) Positive derlin-1 expression was detected in the cytoplasm of tumor cells (blue arrow) but not in the adjacent mammary epithelial cells (red arrows). (b) An enlarged view of the derlin-1-positive tumor cells in (a). (c) An enlarged view of the normal mammary epithelial cells in (a). (d) The same expression was detected as in (a) but in a different sample containing tumor cells (blue arrow) and mammary epithelial cells (red arrow). Bars, 50 μm.