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[Incorporation of a DNA replica of the genome of the tick-borne encephalitis virus into cellular DNA].

DNA from mouse cells chronically infected with tick-borne encephalitis (TBE) virus was treated with restrictases, the resulting fragments were fractionated by size by gel electrophoresis, denaturated, and transferred from gel on nitro-cellulose filters. The fragments containing virus-specific sequences were detected by hybridization with 32P-DNA replicas of TBE genome RNA synthesized using reverse transcriptase. The presence of virus-specific sequences in DNA fragments from chronically infected cells proves the possibility of integration of DNA-replicas of TBE virus genome and genome of chronically infected cells.