FIG. 1.

Agarose gels stained with ethidium bromide showing the results of RT-PCR for human β-actin and HHV-6 U42 (an α-gene), U41 (a β-gene), and U100 (a γ-gene). RNA was extracted at the indicated time (hours) after infection from cells infected with HHV-6 in the presence or absence of CEX and PAA. 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, human DNA extracted from mock-infected cells. The asterisk marks a sample yielding a faint band, difficult to reproduce in print. The sizes of amplified fragments are shown. No contaminant DNA was detected in the samples (U41, 8 h after infection).