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  • Title: The membrane-bound hydrogenase of Alcaligenes eutrophus: II. Localization and immunological comparison with other hydrogenase systems.
    Author: Schink B, Schlegel HG.
    Journal: Antonie Van Leeuwenhoek; 1980; 46(1):1-14. PubMed ID: 6156647.
    Abstract:
    Immunological comparison of the soluble and the membrane-bound hydrogenase of Alcaligenes eutrophus revealed no common antigenic determinants shared by the native proteins, however, a small amount of cross-reacting material was detected after freezing and thawing. Immune precipitation assays supported previous observations indicating the membrane-bound hydrogenase to be localized in the outer surface of the cytoplasmic membrane. The membrane-bound hydrogenases of A. eutrophus and Pseudomonas pseudoflava showed close immunological relationship, and material cross-reacting to both antisera was found in membrane extracts of all hydrogen-oxidizing strains of Pseudomonas. Alcaligenes and Aquaspirillum. Material cross-reacting to the membrane-bound hydrogenase of Xanthobacter autotraphicus GZ 29 was found only in a few hydrogen-oxidizing bacteria. Material cross-reacting to the soluble hydrogenase of A. eutrophus was detected in strains of A. eutrophus and A. ruhlandii only. Comparison of the membrane-bound hydrogenase of A. eutrophus, P. pseudoflava and X. autotrophicus with hydrogenases of other physiological bacterial groups revealed serological relationship to the membrane-bound hydrogenases of the hydrogen bacteria and of Chromatium vinosum only. The results are discussed in terms of physiological, taxonomical, and evolutionary aspects.
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