ZEB1 and cancer: To investigate the degree to which ZEB1 repression drove MET in the TNBC cells we explored the relative changes in epithelial and mesenchymal gene set scores in comparison to breast cancer cell lines from the Cancer Cell Line Encyclopedia (CCLE) and primary breast cancer samples from The Cancer Genome Atlas (TCGA) (Figure 5C).[39] As expected, these highly‐mesenchymal TNBC cell lines clustered together with other basal B cell lines (dark red markers) and a rare subset of metaplastic/claudin low breast cancer tumors (background hexbin within red box).