[Nitrate metabolism in prokariotic evolution--is it reasonable to speculate that nitrate fermentation and respiration may originate at older period than the photosynthetic oxygen evolution? (author's transl)].
D005075:Biological Evolution; D003013:Clostridium / Q000378:metabolism; D009566:Nitrates / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism; D010788:Photosynthesis
D009566:Nitrates; D010100:Oxygen