The panel included multiple non-malignant breast epithelial lines (labeled NM) and many cell lines routinely used to study the three major breast cancer subtypes: hormone receptor positive (HR+), HER2 amplified or overexpressing (HER2amp), and triple negative (TNBC; which lack expression of estrogen, progesterone and HER2 receptors). The gene discussed is ERBB2; the disease is breast carcinoma.