title: Expression of Klebsiella nitrogen fixation genes (nif) in Azotobacter.
mesh_terms: D001395:Azotobacter / Q000378:metabolism; D004926:Escherichia coli; D005796:Genes; D007711:Klebsiella pneumoniae; D009154:Mutation; D009586:Nitrogen Fixation; D010957:Plasmids; D014161:Transduction, Genetic