Immunofluorescent staining for LMP1 revealed that native LMP1 is found in aggregates within the membrane in the EBV+, PTLD-derived B cell lines AB5, JB7, and JC62 (Figure 1B), consistent with previous observations in latently-infected B cells [42], [43]. This evidence concerns the gene PDLIM7 and post-transplant lymphoproliferative disease.