title: A comparison between Nitrosomas europaea and Thiobacillus novellus on the basis of their oxidation systems of inorganic compounds.
abstract: Nitrosomonas europaea and Thiobacillus novellus were compared with each other on the basis of the biochemical properties of their inorganic compound-oxidizing systems. Cytochromes c of the two organisms differ considerably from each other; N. europaea cytochrome c-552 belongs to the "bacterial-type"  cytochrome c, while T. nouellus cytochrome c-550 resembles eucaryolic cytochrome c. The specificity of cytochrome oxidase for cytochrome c as the electron donor is different between the two organisms; T novellus oxidase reacts rapidly with cytochromes c of the organisms which seem to be higher than the organisms whose cytochromes c react rapidly with N. europaea oxidase. On the basis of these facts, N. europaea seems to be older organism than T. novellus in terms of evolution.
mesh_terms: D005075:Biological Evolution; D003579:Cytochrome Reductases / Q000378:metabolism; D003574:Cytochrome c Group / Q000378:metabolism; D003578:Cytochrome-c Peroxidase / Q000378:metabolism; D003580:Cytochromes / Q000378:metabolism; D003576:Electron Transport Complex IV / Q000378:metabolism; D009572:Nitrite Reductases / Q000378:metabolism; D009606:Nitrosomonas / Q000201:enzymology / Q000378:metabolism*; D013855:Thiobacillus / Q000201:enzymology / Q000378:metabolism*
chemical_list: D003574:Cytochrome c Group; D003580:Cytochromes; D003578:Cytochrome-c Peroxidase; D003579:Cytochrome Reductases; D009572:Nitrite Reductases; D003576:Electron Transport Complex IV