title: The heterocysts of blue-green algae. 3. Differentiation and nitrogenase activity.
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D002454:Cell Differentiation; D000458:Cyanobacteria / Q000201:enzymology*; D005288:Ferredoxins; D008027:Light; D008854:Microscopy, Electron; D009586:Nitrogen Fixation; D010088:Oxidoreductases / Q000378:metabolism*
chemical_list: D005288:Ferredoxins; D010088:Oxidoreductases