title: Evolution of antibiotic resistance gene function.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects / Q000235:genetics; D005075:Biological Evolution; D004352:Drug Resistance, Microbial; D005796:Genes; D009154:Mutation; D011815:R Factors; D012486:Salmonella typhimurium / Q000187:drug effects; D012641:Selection, Genetic; D014295:Trimethoprim / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D014295:Trimethoprim