title: Localization of nitrogen fixation in Anabaena.
mesh_terms: D000114:Acetylene / Q000378:metabolism; D000332:Aerobiosis; D000693:Anaerobiosis; D000458:Cyanobacteria / Q000378:metabolism*; D005030:Ethylenes / Q000096:biosynthesis; D005453:Fluorescence; D009586:Nitrogen Fixation; D010084:Oxidation-Reduction
chemical_list: D005030:Ethylenes; D000114:Acetylene