In order to investigate the quantity of p16INK4a-encoding transcripts expressed in normal primary B cells during the first weeks after infection with EBV, two RT-PCR assays were utilized – one based on a qPCR detecting an amplicon in INK4a exon 1 (Figure 7A) and a second that targets the exon 2/3 boundary shared by p16INK4a and p14ARF (Figure 7B). The gene discussed is CDKN2A; the disease is infection.