Detection of EBNA2 and LMP1 transcripts in lymphadenopathy lesions and lymphomas. Multiplex-PCR was performed using primers specific for the β-actin gene and either EBNA2 (A) or LMP1 gene (B); the amplified products of 117 bp, 209 bp, and 296 bp, respectively, were stained with ethidium bromide and hybridized with probes specific for EBNA2 or LMP1 and β-actin genes. M, molecular-weight marker φx 174/HaeIII.