EPCAM and malignant colon neoplasm: Considering colon cancer cell lines including SW480, SW620 and LoVo express different levels of biomarkers (e.g., EpCAM), which was confirmed by the flow cytometry (Additional file 1: Figure S1), the binding and capture capability of antiEpCAM and antiSlex sequentially-conjugated dendrimer conjugate (PE-5A-G6-5S-FITC) to the above EpCAM and Slex-expressing colon cancer cell lines was individually investigated by us.