ERBB2 and cancer: Epithelial cells had weaker similarity (ARI: 0.091) between Myc;Ptenfl unsupervised clusters and scPred assigned class (Fig. 7B, mouse model (MM): c10, 19, 2, 8 and Human Species (HS): Cancer, LumA/B, Her2, Basal, Progenitor), however the epithelial states in the human reference data were themselves assigned via a classifier and are therefore not intrinsic to the underlying data.