For example, in a study across six different breast cancer cell lines, while four of them were largely homogenous in terms of relative levels of EpCAM (Epithelial Cell Adhesion Molecule—a common epithelial marker), two of them—HCC38 and HCC1143—had a 90:10 and 99:1 ratio of EpCAMhigh to EpCAMlow cells respectively [19]. Here, EPCAM is linked to breast carcinoma.