Free viral DNA in BK virus-induced hamster tumor cells.
AUTOR(ES)
ter Schegget, J
RESUMO
The biological properties of nine clonal lines of BK virus-induced hamster tumor cells were studied. All clonal lines were oncogenic and showed an enhanced ability to form colonies in semisolid medium. The cells of each clonal line contained T antigen; no virus could be rescued from any of the clonal lines. The number of viral DNA copies was determined in three of the clonal lines and varied from 10 to 20 copies per diploid amount of cell DNA. The state of the viral genome was studied in these lines, and the great majority of the viral DNA molecules appeared to be present as free (nonintegrated) molecules. At least six length classes of free defective BK virus DNA molecules, which all lacked a part of the late region of the genome, were detected in these cells. Three of the six length classes of BK virus DNA molecules acquired a TaqI recognition site, which suggested substitution of cellular DNA.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=288817Documentos Relacionados
- Integrated and free viral DNA in hamster tumors induced by BK virus.
- Even transcriptionally competent proviruses are silent in bovine leukemia virus-induced sheep tumor cells.
- Properties of Noninfectious and Transforming Viruses Released by Murine Sarcoma Virus-Induced Hamster Tumor Cells
- Murine Virus-Induced Proteins Synthesized by Hamster Tumor Cells Transformed by, But Not Producing, Murine Sarcoma Virus
- Virus-induced decrease of insulin receptors in cultured human cells.