title: Classification of trimethoprim-resistant dihydrofolate reductases mediated by R-plasmids using isoelectric focussing.
mesh_terms: D000818:Animals; D002852:Chromatography, Ion Exchange / Q000379:methods; D004926:Escherichia coli / Q000201:enzymology; D005493:Folic Acid Antagonists; D007525:Isoelectric Focusing / Q000379:methods; D011815:R Factors; D013552:Swine; D013696:Temperature; D013762:Tetrahydrofolate Dehydrogenase / Q000235:genetics*; D014295:Trimethoprim / Q000494:pharmacology*
chemical_list: D005493:Folic Acid Antagonists; D014295:Trimethoprim; D013762:Tetrahydrofolate Dehydrogenase