title: Host dependence of RP1-specified resistance to ampicillin: differential expression in Escherichia coli and Rhizobium leguminosarum.
abstract: Rhizobium leguminosarum L4 is able to serve as a host for the plasmid RP1. Properties of R. leguminosarum [RP1] plasmid carrier suggest that the expression of RP1-coded Apr gene(s) is inhibited in this host, although the determinants of transfer and resistance to kanamycin and tetracycline are expressed. This system exemplifies a differential expression of plasmid genes in a new host.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology*; D004926:Escherichia coli / Q000235:genetics*; D005784:Gene Amplification; D005796:Genes; D010403:Penicillin Resistance; D010957:Plasmids; D012231:Rhizobium / Q000235:genetics*; D013045:Species Specificity
chemical_list: D000667:Ampicillin