KRT19 and neoplasm: On the other hand, we observed K5+/K19+ cell line over-expressing mRas/mp53/wtEGFR had a low primary tumor latency as compared to K5+/K19− with same oncogene combination (Figure 5A, Tables 1, 2, Supplementary Table 2) and high tumor incidence (Supplementary Table 5) as compared to all other cell lines tested.