Southern blot analyses for EBV terminal repeat and KSHV. DNA samples were digested with the BamHI restriction enzyme and hybridized to the BamHI NJ-het probe (upper panel) and to the KS330Bam probe (lower panel). UH1, an established LCL, was used as a positive control for EBV and as a negative control for KSHV. The number above each lane corresponds to the PEL case.