As shown in Figure 3D (left), flow cytometry analysis indicated that cell surface CDCP1 levels vary widely between cancer cell lines, ranging from ~2x103 anti-CDCP1 antibodies bound/cell for lung cancer CRL5559 cells to ~3x105 anti-CDCP1 antibodies bound/cell for PDAC TKCC2.1 cells. Here, CDCP1 is linked to cancer.