title: Molecular cloning of the gene for the beta-lactamase of Bacillus licheniformis and its expression in Escherichia coli.
abstract: The structural gene, pen, for the beta-lactamase of B. licheniformis has been cloned into a lambda vector and shown to be expressed at a low rate in E. coli. The cloned pen gene appears to be expressed from a promoter within the fragment of B. licheniformia DNA, since its rate of expression is not affected by the presence of the phage repressor, the absence of the phage's positive-control functions, or the position or orientation of the gene within the phage genome.
mesh_terms: D001407:Bacillus / Q000235:genetics*; D010582:Bacteriophage lambda / Q000235:genetics; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics*; D005796:Genes; D010405:Penicillinase / Q000235:genetics*; D010641:Phenotype; D014169:Transformation, Bacterial; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D010405:Penicillinase; D001618:beta-Lactamases