However, RA signaling disruption had a much greater impact in the induction of KRT13 in BC-2-BMS than in BC-1-BMS-derived cultures (BC-1-BMS: 5.46 ± 0.85% vs BC-2-BMS: 13.06 ± 1.72%; Figure 4A–C). This evidence concerns the gene KRT13 and breast cancer.