SUV39H1 and fibrosarcoma: Also, we generated a new mouse strain, namely the Suv39h1-Flox*CD4-Cre, in which mice are KO for SUV39h1 only in T cells (see the section “Methods” for strain description), and we grafted them with the MCA-101 fibrosarcoma cell line, which is less immunogenic that the B16-F10-OVA (Supplementary Fig. 1C–E).