transmission electron microscopy and immunocytological labeling were used to study the distribution and ontological occurrence of dinitrogenase reductase ( fe-protein ) of nitrogenase in cyanobacterial symbionts within young leaves of the water-ferns azolla filiculoides lamarck , a. caroliniana willdenow , and a. pinnata r .
C0085544
dinitrogenase reductase
C0028174
nitrogenase