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  • Title: Selective transcription of vaccinia virus genes in template dependent soluble extracts of infected cells.
    Author: Puckett C, Moss B.
    Journal: Cell; 1983 Dec; 35(2 Pt 1):441-8. PubMed ID: 6317189.
    Abstract:
    A soluble system that specifically and accurately initiates transcription on defined vaccinia virus templates has been obtained from lysates of infected cells. The required regulatory signals are contained within a DNA segment extending about 230 bp upstream and 30 bp downstream of the RNA start site. Transcription is resistant to alpha-amanitin and inhibited by antibodies to the viral RNA polymerase. Whole cell extracts from uninfected cells cannot accurately transcribe vaccinia DNA. Conversely, extracts prepared at 2 hr or later after vaccinia infection no longer transcribe RNA polymerase II templates but retain the ability to transcribe RNA polymerase III templates as well as vaccinia virus DNA. These profound changes in transcriptional specificity may contribute to the selective expression of viral genes following vaccinia infection.
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