BCL2 and neoplasm: First, although Eμmyc/EμBCL‐2 murine tumors and EBV‐positive BL cells both overexpress MYC and BCL‐2 proteins, they have very different phenotypes: Eμmyc/EμBCL‐2 tumor cells have a lymphomyeloid progenitor phenotype [35], whereas BL cells have a GC phenotype.