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. 1982 Aug;2(8):966–976. doi: 10.1128/mcb.2.8.966

Introduction and recovery of a selectable bacterial gene from the genome of mammalian cells.

M L Breitman, L C Tsui, M Buchwald, L Siminovitch
PMCID: PMC369884  PMID: 6290875

Abstract

The simian virus 40 (SV40)-pBR322 recombinant, pSV2, carrying the origin of SV40 replication and the gpt gene of Escherichia coli, has been stably introduced into Chinese hamster ovary hprt- cells. All gpt-transformed cell lines were found to contain one or more insertions of pSV2 sequences exclusively associated with high-molecular-weight DNA. Additional analyses showed that at least one integrated copy in each cell line retained an intact gpt gene and flanking SV40 sequences required for expression of xanthine-guanine phosphoribosyltransferase. Most cell lines contained pSV2 sequences which had integrated with partial sequence duplication. Upon fusion with COS-1 cells, a simian cell line permissive for autonomous pSV2 replication, most gpt-transformed cell lines produced low-molecular-weight DNA molecules related to pSV2. The majority of these replicating DNAs were indistinguishable from the original transfecting plasmid in both size and restriction enzyme cleavage pattern. In addition, the recovered DNA molecules were able to confer ampicillin resistance to E. coli and to transform mouse L cells and Gpt- E. coli to a Gpt+ phenotype. These studies indicate that all of the genetic information carried by this SV40-plasmid recombinant can be introduced into and retrieved from the genome of mammalian cells.

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These references are in PubMed. This may not be the complete list of references from this article.

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