Cancer cell lines were then divided into three subcategories based on breast cancer molecular signatures: luminal (ZR751, BT474, ZR7530, MCF7, and T47D), HER2-enriched (HCC1954 and SKBR3), and triple-negative (HCC70, BT549, and MDA-MB-231). This evidence concerns the gene ERBB2 and breast carcinoma.