title: Derepression of nitrogenase synthesis in the presence of excess NH4+.
mesh_terms: D000641:Ammonia / Q000378:metabolism / Q000494:pharmacology*; D001395:Azotobacter / Q000187:drug effects / Q000201:enzymology* / Q000378:metabolism; D004794:Enzyme Repression / Q000187:drug effects; D007711:Klebsiella pneumoniae / Q000187:drug effects / Q000201:enzymology* / Q000378:metabolism; D008715:Methionine; D009584:Nitrogen / Q000378:metabolism; D009591:Nitrogenase / Q000037:antagonists & inhibitors / Q000096:biosynthesis*; D010091:Oximes / Q000494:pharmacology; D013045:Species Specificity; D013450:Sulfones / Q000494:pharmacology
chemical_list: D010091:Oximes; D013450:Sulfones; D000641:Ammonia; D008715:Methionine; D009591:Nitrogenase; D009584:Nitrogen