Isolation and characterization of DNA-dependent RNA polymerase I of Tetrahymena pyriformis.

@article{Mueller1985IsolationAC,
  title={Isolation and characterization of DNA-dependent RNA polymerase I of Tetrahymena pyriformis.},
  author={Karl Mueller and Manfred Freiburg and G. Hoyer-Feige},
  journal={Journal of biochemistry},
  year={1985},
  volume={98 5},
  pages={
          1157-67
        }
}
A procedure for the separation and purification of DNA-dependent RNA polymerases [EC 2.7.7.6] from macronuclei of Tetrahymena pyriformis is described. We have used it to isolate and characterize the class I enzyme. RNA polymerase I was identified by its resistance against alpha-amanitin and its location in nucleoli. The purified enzyme consists of at least 12 major subunits with approximate molecular weights of 180,000, 118,000, 37,500, 36,000, 29,000, 27,500, 20,000, 18,500, 15,600, 14,500, 13… 
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