title: Stable maintenance in chemostat-grown Escherichia coli of pBR322 and pACYC184 by disruption of the tetracycline resistance gene.
abstract: Plasmid stability was studied in antibiotic-free chemostat cultures. Disruption, either by deletion or insertion, of the tetracycline resistance gene in the EcoR1/EcoRV region of the cloning vector pBR322 or in the HindIII/BamH1 region of pACYC184 yields plasmids markedly more stable than the parent plasmids. Thus, at least for these two instances, cloning of a partitioning (par) locus is not prerequisite for plasmid maintenance.
mesh_terms: D003001:Cloning, Molecular; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics*; D010957:Plasmids; D011815:R Factors; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D013752:Tetracycline