Single-cell RNA sequencing of 361 metastatic and primary tumor cells via Cel-seq2 (Hashimshony et al., 2016) revealed expression of dendra2 and Krt19 but not markers of hepatocytes, endothelial cells, immune cells, and fibroblasts (Figure 1F), confirming the purity of the isolated cell populations. This evidence concerns the gene KRT19 and neoplasm.