Biochemical Genetics

, Volume 8, Issue 4, pp 357–364 | Cite as

Effects of bacterial products on a Paramecium esterase

  • I. Gibson
  • A. Cavill


Cultures of Aerobacter aerogenes, Bacillus subtilis, or Escherichia coli have been shown to induce the disappearance of an esterase from Paramecium. This effect is transmitted only by live cells, and it occurs when a 0.45 μ filter separates the protozoan and the particular bacterium. There is a delay of 6 days before the effect occurs, and if the bacteria are removed the enzyme returns in the paramecia after a further delay. Characterization of the effective bacterial agent shows it to be a protein or ribonucleoprotein.


Escherichia Coli Live Cell Bacillus Subtilis Bacterial Product Bacterial Agent 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Allen, S. L., and Gibson, I. (1971). Intersyngenic variations in the esterases of axenic stocks of Paramecium aurelia. Biochem. Genet. 5161.Google Scholar
  2. Allen, S. L., and Golembiewski, P. A. (1972). Inheritance of esterase A and B in syngen 2 of Paramecium aurelia. Genetics 71469.Google Scholar
  3. Lowry, O. H., Roseborough, N. J., Farr, A. L., and Randell, R. J. (1951). Protein measurement with the folin phenol reagent. J. Biol. Chem. 193265.Google Scholar
  4. Rowe, E., Gibson, I., and Cavill, A. (1971). The effect of growth conditions on the esterases of Paramecium aurelia. Biochem. Genet. 5151.Google Scholar
  5. Williams, J. (1971). The growth in vitro of killer particles from Paramecium aurelia and the axenic cultures of this protozoon. J. Gen. Microbiol. 68253.Google Scholar

Copyright information

© Plenum Publishing Corporation 1973

Authors and Affiliations

  • I. Gibson
    • 1
  • A. Cavill
    • 1
  1. 1.School of Biological SciencesUniversity of East AngliaNorwichGreat Britain

Personalised recommendations