title: Identification of the Sym plasmid of Rhizobium leguminosarum strain 1001 and its transfer to and expression in other rhizobia and Agrobacterium tumefaciens.
mesh_terms: D009586:Nitrogen Fixation; D010641:Phenotype; D010957:Plasmids; D012231:Rhizobium / Q000235:genetics*; D014169:Transformation, Bacterial