title: Conjugative R plasmids in group C and G streptococci.
abstract: Two streptococcal isolates of groups C and G harbored conjugative R plasmids with molecular weights of 17 X 10(6) (pIP646) and 20 X 10(6) (pIP920). These plasmids carried genetic markers for resistance to macrolides and related drugs, as well as to chloramphenicol (pIP920), and have very similar HindIII restriction enzyme patterns.
mesh_terms: D003227:Conjugation, Genetic; D004262:DNA Restriction Enzymes / Q000378:metabolism; D008970:Molecular Weight; D011815:R Factors; D013291:Streptococcus / Q000235:genetics*
chemical_list: D004262:DNA Restriction Enzymes