title: Penicillinase plasmids of Staphylococcus aureus: structural and evolutionary relationships.
mesh_terms: D005075:Biological Evolution; D004262:DNA Restriction Enzymes; D009692:Nucleic Acid Heteroduplexes; D010405:Penicillinase / Q000235:genetics*; D010641:Phenotype; D011815:R Factors; D013211:Staphylococcus aureus / Q000235:genetics*
chemical_list: D009692:Nucleic Acid Heteroduplexes; D004262:DNA Restriction Enzymes; D010405:Penicillinase