Phages selected from eluate fraction, LGLRGSL (E11), GTFLFS (E32), and PNLPWVP (E45) were very selective for EMT phenotypic cells (MCF-7/TGFβ, MDA-MB-231, and T47D-shNMI) and showed more than 10 times binding as compared to its binding to breast fibroblasts (Hs578T) and epithelial breast cancer cells (MCF-7 and T47D) in phage capture assay (Figure 3A). The gene discussed is TGFB1; the disease is breast cancer.