Moreover, flow cytometry showed that the tumor tissue of EL4-Axl-bearing mice had higher percentages of activated CTLs (CD8+CD44+; MFI, 837) and NK cells (NK1.1+CD44+; MFI, 974) than in the mock controls (CD8+CD44+; MFI, 618, NK1.1+CD44+; MFI, 671) (Figure 5F). This evidence concerns the gene CD44 and neoplasm.