FIG. 5.

Agarose gels stained with ethidium bromide showing the cDNA amplified by RT-PCR for U91 and U18-U19-U20. RNA was extracted 8 h p.i. from cells infected with HHV-6A (U1102) or HHV-6B (CV) in the presence or absence of CEX. D, PCR on DNA from HHV-6-infected cells, extracted 4 days p.i., at complete CPE. R, RT-PCR on RNA extracted from HHV-6-infected cells at complete CPE; M, 123-bp ladder molecular size marker; M1, lambda HindIII molecular size marker, showing the 2,322-, 2,027-, and 564-bp fragments. The sizes of the amplified fragments are shown.