Figure 4: The #1-F aptamer binds to primary epithelial and carcinoma cells. Patient-derived primary cells isolated from normal colon, colon carcinoma, normal lung, lung carcinoma, and stomach carcinoma tissues were dual-stained with the #1-F aptamer and the anti-EpCAM antibody. Data shown are for unstained controls. (a) anti-EpCAM antibody-stained gate. (b) anti-EpCAM antibody and (c) aptamer dualstained cells.