title: Isolation of plasmid DNA from naturally-occurring strains of Streptococcus mutans.
mesh_terms: D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial / Q000235:genetics / Q000302:isolation & purification*; D008970:Molecular Weight; D009113:Muramidase; D010957:Plasmids; D013045:Species Specificity; D013295:Streptococcus mutans / Q000032:analysis* / Q000235:genetics
chemical_list: D004269:DNA, Bacterial; D009113:Muramidase