Endogenously expressed EBNA3C was immunoprecipitated from two EBV-transformed lymphoblastoid cell lines (LCL1 and LCL2) or a Burkitt lymphoma (BL) cell line -BJAB stably expressing EBNA3C (E3C7 and E3C10) using an EBNA3C reactive rabbit polyclonal antibody, and co-immunoprecipitation (co-IP) of E2F1 was monitored by immunoblotting using an E2F1 specific antibody (Figure 1A and 1B, respectively). This evidence concerns the gene E2F1 and Burkitt lymphoma.