Fig. 4. ß-eng expression in HC11 cells induces apoptosis. Fluorescent microscopy revealed apoptotic (TUNEL-positive) cells (green), DAPI-labelled nuclei (blue) and antibody against myc tag (red). Mock-infected HC11 cells show very low levels of apoptosis (A,C), whereas infection of cells with ß-eng (B,D) induced apoptosis fivefold (C). Bars, 100 µm (A,B); 25 µm (D). *P<0.001.