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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Biochemical genetics 11 (1974), S. 455-474 
    ISSN: 1573-4927
    Keywords: Bacillus subtilis ; competence factor ; transformation ; cell walls ; nuclease ; mesosomes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract It has been shown that the competence-inducing factor of Bacillus subtilis 168I− exhibits lytic activity toward isolated cell walls and nuclease activity toward transforming DNA. It has been shown that the competence factor covalently bound to CNBr-Sepharose exhibits the same enzymatic properties. A mechanism for the transformation process is proposed which advances the mechanism previously proposed by this laboratory.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 49 (1971), S. 1187-1189 
    ISSN: 1432-1440
    Keywords: Acetylsalicylic acid ; lymphocytes ; transformation ; hexokinase activity ; Acetylsalicylsäure ; Lymphocyten ; Transformation ; Hexokinase-Aktivität
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Acetylsalicylsäure hemmt die Hexokinaseaktivität menschlicher Lymphocyten in vitro. Die Wirkung ist konzentrationsproportional und läßt sich oberhalb von 2–3 mMol/l nachweisen. In Übereinstimmung damit ist die Glucose-C14-Decarboxylierung herabgesetzt. Diese Hemmwirkung könnte Ursache für eine nachgewiesene Beeinträchtigung der Lymphocytentransformation bzw. des C14-Thymidineinbaus in Gegenwart von Acetylsalicylsäure sein. Entsprechend dem offenbar Glucose-kompetitiven Wirkungsmechanismus des Acetylsalicylats war die Hemmung des Thymidineinbaus in stimulierte Lymphocyten durch Erhöhung der Glucosekonzentration im Kulturmedium rückgängig zu machen. Die Befunde könnten auf eine immunsuppressive Wirkung der Acetylsalicylsäure hindeuten.
    Notes: Summary Acetylsalicylic acid inhibits the hexokinase activity of human lymphocytes in vitro. The effect is proportional to the concentration and is readily demonstrable at concentrations greater than 2–3 mMols per liter. In agreement with this, a reduction in the glucose-C14-decarboxylation rate is seen. This inhibitory effect could be the cause of the observed deterioration of the lymphocyte transformation and C14-thymidine incorporation in the presence of acetylsalicylic acid. Corresponding to the evident glucose-competitive mechanism of the acetylsalicylates, the inhibition of the thymidine incorporation in stimulated lymphocytes was reversed by increasing the glucose concentration of the culture medium. The results would seem to indicate an immunosuppressive action of acetylsalicylic acid.
    Type of Medium: Electronic Resource
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