Interactions of Polyoma and Mouse DNAs II. Polyoma-Induced Mouse DNA Replication and Pseudovirion Formation
| Autor: | Hans Türler |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
DNA Replication
viruses Immunology Cesium Biology Tritium Microbiology Virus Cell Line Mice chemistry.chemical_compound Pseudovirion Chlorides Virology Animal Viruses Centrifugation Density Gradient Animals Cells Cultured Differential centrifugation DNA replication Embryo DNA Fibroblasts Molecular biology Microscopy Electron Bromodeoxyuridine chemistry Cell culture Insect Science DNA Viral DNA Circular Floxuridine Polyomavirus |
| Zdroj: | Journal of Virology. 13:285-290 |
| ISSN: | 1098-5514 0022-538X |
| DOI: | 10.1128/jvi.13.2.285-290.1974 |
| Popis: | Secondary mouse embryo (ME) cultures which had been grown prior to infection in the presence of 5-bromodeoxyuridine (BUdR) and 5-fluorodeoxy-uridine were found to be permissive for polyoma virus (16). The DNA extracted from the progeny virus yielded two bands on CsCl isopycnic centrifugation. The light band (LL) contained supercoiled circular (polyoma DNA I), open circular (polyoma DNA II), and linear (polyoma DNA III) molecules, as was seen by electron microscopy. The hybrid band (HL) contained exclusively linear molecules. This DNA was pure, density - labeled, pseudovirion DNA, i.e., fragmented HL mouse DNA. The quantitative comparison of HL and LL polyoma DNA III from six different virus preparations always revealed an excess of HL DNA, the ratio of HL/LL being between 1.2 and 2.2. These results led to the conclusion that in BUdR-prelabeled, polyoma-infected ME cells pseudovirion DNA is excised both from unreplicated and newly replicated regions of mouse DNA. |
| Databáze: | OpenAIRE |
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