Fig. (4) RT-PCR analysis to detect Cp-mRNA, Wp-mRNA, Cp/Wp-derived EBNA1, and Qp-derived EBNA1 transcripts. RT-PCR proceeded using primer sets described in Materials and Methods. Total RNA was isolated from BJAB, Akata, LCL/B95-8, RABM/EBV +1-3 and TKS-1. Ribosomal RNA (18S) served as internal control.