title: The nitrogen fixation cistrons of Klebsiella pneumoniae.
mesh_terms: D000483:Alleles; D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial / Q000378:metabolism; D005796:Genes; D005816:Genetic Complementation Test; D007711:Klebsiella pneumoniae / Q000235:genetics*; D009154:Mutation; D009586:Nitrogen Fixation; D010641:Phenotype; D010957:Plasmids; D013045:Species Specificity