title: Molecular genetics of symbiotic nitrogen fixation.
mesh_terms: D004251:DNA Transposable Elements; D005798:Genes, Bacterial; D008040:Genetic Linkage; D009586:Nitrogen Fixation; D009591:Nitrogenase / Q000235:genetics; D010957:Plasmids; D012231:Rhizobium / Q000235:genetics* / Q000378:metabolism; D013559:Symbiosis
chemical_list: D004251:DNA Transposable Elements; D009591:Nitrogenase