Oxygen and the enzymes of obligate aerobes.
D000332:Aerobiosis; D000421:Alcaligenes / Q000378:metabolism*; D001395:Azotobacter / Q000378:metabolism*; D004579:Electron Transport; D006019:Glycolysis; D006885:Hydroxybutyrates / Q000378:metabolism; D008660:Metabolism; D010101:Oxygen Consumption
D006885:Hydroxybutyrates