To determine the Kras genotype and number of neoplastic cells in each tumor in T;H11LSL-Cas9, PT;H11LSL-Cas9, and LT;H11LSL-Cas9 mice, we added a normalization control consisting of DNA from 5 × 105 cells with a known barcode to each lung sample (Fig. 6a and Supplementary Fig. 9). This evidence concerns the gene KRAS and neoplasm.