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  • Title: A comparison between Nitrosomas europaea and Thiobacillus novellus on the basis of their oxidation systems of inorganic compounds.
    Author: Yamanaka T, Shinra M, Kimura K.
    Journal: Biosystems; 1977 Sep; 9(2-3):155-64. PubMed ID: 198039.
    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.
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