title: Plasmid deoxyribonucleic acid in Rhizobium vigna and Rhizobium trifolii.
mesh_terms: D002499:Centrifugation, Density Gradient; D004269:DNA, Bacterial / Q000032:analysis*; D005111:Extrachromosomal Inheritance; D010957:Plasmids; D012231:Rhizobium / Q000032:analysis*; D013045:Species Specificity
chemical_list: D004269:DNA, Bacterial