Figure 2.

 Expression of activation‐induced cytidine deaminase (AID), c‐myc, and bcl‐2 in c‐myc‐associated rapidly progressive follicular lymphoma (RPFL), Burkitt’s lymphoma (BL), and B‐cell lymphoma, unclassifiable with features intermediate between DLBCL and BL (BCLU), determined by RT‐PCR. Expression of c‐myc, AID, and bcl‐2 was examined in tissue biopsy samples from patients with c‐myc‐associated RPFL (n = 2), BL (n = 2), and BCLU (n = 1) before treatment, and two additional second‐biopsy specimens from RPFL patients at the progressive stage (shortly before death). A human BL cell line (Raji) was used as a positive control. β‐actin was used as an endogenous control.