ASCL1 and neoplasm: We then combined the transcriptomes of each assigned cell type into Unionized Cell Type RNA-seq (Supplementary Data 8) for each tumor to better demonstrate the specificity of the cell type signature genes and how their expression was altered in the triplicates of Ascl1-OE tumors (BM18-2, BM18-5, BM18-6) compared to control tumors (BM17-3, BM17-4, BM17-5).