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  • Title: [Excision process of integrated plasmid pBD12 from the Bacillus subtilis chromosome].
    Author: Savchenko GB, Glumova EF, Prozorov AA.
    Journal: Genetika; 1985 Feb; 21(2):229-38. PubMed ID: 3921430.
    Abstract:
    We studied the behavior of pBD12 plasmid integrated into Bacillus subtilis chromosome via homologous recombination. One copy of the plasmid was integrated into the chromosome, it conferred resistance to low concentrations of antibiotics. Clones with enhanced resistance bearing autonomous plasmid DNAs appeared with a frequency 10(-6) in rec+ but not in recE strain with the integrated plasmid. By restriction and hybridization analysis of some excised plasmids, the sites of excision were determined, chromosomal location of pBD12 plasmid was found to be at the terminal fragment of prophage DNA, so that the att site of phi 105 phage is supposed to be situated on the EcoRI fragment of phage DNA.
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