CDCP1 and lung carcinoma: Binding to CDCP1 by our antibodies was confirmed by flow cytometry on NCI-H358 lung cancer cells, where siRNA knock-down of CDCP1 reduced the level of antibody binding (Fig. 2d and Additional file 3: Figure S3A), and by direct ELISA performed using recombinant full-length CDCP1 (Additional file 3: Figure S3B).