| Literature DB >> 2993800 |
M Matfield, R Badawi, W J Brammar.
Abstract
Plasmidic recombination in E. coli K12 has been previously demonstrated to be dependent on the host rec genotype. The construction of plasmids that carry a duplication within an antibiotic-resistance gene is described. Recombination between the direct repeats recreates an active antibiotic-resistance gene, allowing quantitative analysis of recombination frequencies in a closely related set of E. coli K12 strains carrying various rec mutations. Using this system, intraplasmidic recombination of a duplication within the pBR322 tetracycline-resistance gene is shown to be rec-dependent while recombination of a similar duplication within the kanamycin-resistance gene of Tn903 is shown to be independent of recA, recB, recC, recE, recF and sbcB.Entities:
Mesh:
Substances:
Year: 1985 PMID: 2993800 DOI: 10.1007/bf00330768
Source DB: PubMed Journal: Mol Gen Genet ISSN: 0026-8925