title: Nitrogenase activity in heterocysts of blue-green algae.
mesh_terms: D001345:Autoradiography; D001665:Binding Sites; D002245:Carbon Dioxide / Q000378:metabolism; D002247:Carbon Isotopes; D000458:Cyanobacteria / Q000201:enzymology*; D009586:Nitrogen Fixation; D010088:Oxidoreductases / Q000378:metabolism; D014465:Ultrasonics
chemical_list: D002247:Carbon Isotopes; D002245:Carbon Dioxide; D010088:Oxidoreductases