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  • Title: Adenovirus type 2-simian virus 40 hybrid population: evidence for a hybrid deoxyribonucleic acid molecule and the absence of adenovirus-encapsidated circular simian virus 40 deoxyribonucleic acid.
    Author: Crumpacker CS, Levin MJ, Wiese WH, Rowe WP, Lewis AM.
    Journal: J Virol; 1970 Dec; 6(6):788-94. PubMed ID: 4322081.
    Abstract:
    The deoxyribonucleic acid (DNA) from the adenovirus-encapsidated particles of the adenovirus type 2 (Ad2)-simian virus 40 (SV40) hybrid population plaque variant (Ad2(++) HEY), known to yield SV40 virus with high efficiency, was studied by equilibrium density centrifugation followed by ribonucleic acid-DNA hybridization employing virus-specific complementary ribonucleic acids synthesized in vitro. These techniques establish linkage between the Ad2 and SV40 components in the adenovirus-encapsidated particles of this population. The linkage is alkali-resistant and presumably covalent; thus, the Ad2 DNA and SV40 DNA are present in a hybrid molecule. Velocity centrifugation studies in alkaline sucrose gradients eliminated the possibility that supercoiled circular SV40 DNA is present in the adenovirus capsids. The DNA obtained from the adenovirus-encapsidated particles of the Ad2(++) HEY population appears to consist of nonhybrid Ad2 DNA and Ad2-SV40 hybrid DNA molecules.
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