Restriction enzyme maps of the BCL6. The major translocation cluster (MTC) of the BCL6 and the major mutation cluster (MMC) were as determined by Bastard et al²⁷  and Bernardin et al,⁵¹  respectively. F372²⁷  and Sac 4.0³²  are probes for Southern blot analysis. Arrowheads are the positions of primers for LDI-PCR. Restriction sites are as follows: E represents, EcoRI; B, BamHI; H, HindIII; X, XbaI; S, SacI; Xh, XhoI.