title: Narrow host range of some streptococcal R plasmids.
mesh_terms: D004261:DNA Replication; D004269:DNA, Bacterial / Q000096:biosynthesis; D009154:Mutation; D011815:R Factors; D013045:Species Specificity; D013291:Streptococcus / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial