title: In vivo expression of lac promoter variants with altered -10, -35, and spacer sequences.
mesh_terms: D001483:Base Sequence; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics*; D014644:Genetic Variation; D007763:Lac Operon; D009154:Mutation; D010957:Plasmids; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D013752:Tetracycline