Hydrogen metabolism and the alternative nitrogenase in the cyanbacterium Anabaena variabilis

  • H. Bothe
  • G. Haverkamp
  • T. Kentemich


The alternative nitrogenase was demonstrated in Azo-tobacter (1) and also occurs in Anabaena variabilis. This cyanobacterium can be grown in dependence on V in the medium under N2-fixing conditions(2). The cyanobacterial V-nitrogenase reduces C2H2 with lower rates than the Mo-enzyme, forms partly C2H6 and produces more H2 than the Azotobacter V-nitrogenase(3). This communication reports some new data on the expression of nitrogenases in A. variabilis.


Nitrogen Fixation Fresh Medium Nitrate Reductase Control Culture Reductase Activity 
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Copyright information

© Routledge, Chapman & Hall, Inc. 1990

Authors and Affiliations

  • H. Bothe
    • 1
  • G. Haverkamp
    • 1
  • T. Kentemich
    • 1
  1. 1.Botanisches InstitutUniversität KölnD-5-Köln 41Germany

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