Integrin β6 expression in human colonic cancer. First row: (a), (b), (c) (Scale bar 200 μm.); second row: (d), (e), (f), corresponding to each figure above (Scale bar 100 μm). (a) and (d) was obtained from paracancerous normal tissue of patient with colon cancer, with negative staining. (b) and (e) was obtained from colonic carcinoma tissue,with negative Integrin β6 expression. (c) and (f) was obtained from colonic carcinoma, with positive Integrin β6 expression.