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- W2121647749 abstract "Lv-myc is a recombinant retrovirus that spontaneously arose during experiments designed to express the provirus LNAv-myc in the hematopoietic system of bone marrow-reconstituted mice (L. Bonham, K. MacKenzie, S. Wood, P. B. Rowe, and G. Symonds, Oncogene 7:2219-2229, 1992). The recombinant provirus is of interest because it is able to promote long terminal repeat-initiated transcription in hematopoietic cells in vivo, whereas the parental provirus, LNAv-myc, is transcriptionally repressed in the same cells. Here we report that Lv-myc was generated by precise deletion of the neomycin resistance gene (neo) and the human gamma-actin promoter from LNAv-myc. In comparison with LNAv-myc, no sequence alterations in the viral regulatory regions of Lv-myc were detected. Thus, it appears that neo and/or the gamma-actin promoter exerted a cis-acting repressor effect on the long terminal repeat of LNAv-myc in vivo. The origin of Lv-myc was also investigated, and it was shown that Lv-myc was harbored as a productive provirus in a G418-resistant subpopulation of the LNAv-myc producer cell line, psi 2AV. It appears that Lv-myc arose during propagation of the psi 2AV cell line. Repeated sequence detected at the sites of the deletion suggest that Lv-myc was generated by a template misalignment during reverse transcription of LNAv-myc." @default.
- W2121647749 created "2016-06-24" @default.
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- W2121647749 date "1994-11-01" @default.
- W2121647749 modified "2023-09-27" @default.
- W2121647749 title "An internal deletion enhances the transcriptional activity of a recombinant retrovirus in hematopoietic cells in vivo" @default.
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- W2121647749 doi "https://doi.org/10.1128/jvi.68.11.6924-6932.1994" @default.
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