Levels of RNA polymerase activities during growth, encystment and germination ofPhysarum polycephalum

  • Armin Hildebrandt
  • Helmut W. Sauer


Two RNA polymerases, enzyme A and enzyme B, were prepared fromPhysarum plasmodia. They are not located in the cytosol. Isolated nuclei, however, contain only a fraction of the total RNA polymerase activity: 1.5–19% depending on the nuclear preparation method.

The level of RNA polymerase B shows little variation at developmental stages of growth and encystment, or in cysts and during germination, whereas RNA polymerase A displays a marked transient decrease in activity during the stationary growth phase before encystment.

Key words

RNA polymerases Enzymelocalization activity levels Growth Ancystment 


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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Armin Hildebrandt
    • 1
  • Helmut W. Sauer
    • 1
  1. 1.Fachbereich Biologie der Universität KonstanzKonstanzFederal Republic of Germany

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