Summary
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.
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Hildebrandt, A., Sauer, H.W. Levels of RNA polymerase activities during growth, encystment and germination ofPhysarum polycephalum . Wilhelm Roux' Archiv 180, 149–156 (1976). https://doi.org/10.1007/BF00848103
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DOI: https://doi.org/10.1007/BF00848103