Isolation of cell cycle fractions by counterflow centrifugal elutriation

Michael G. Kauffman, Stephen J. Noga, Thomas J. Kelly, Albert D. Donnenberg

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Counterflow centrifugal elutriation (CCE) has been used to fractionate cell populations on the basis of sedimentation properties, with minimal perturbation of metabolic function. Therefore, it is an ideal method for the isolation of cell cycle phase specific populations. We present modifications of the standard Beckman centrifugal elutriation system which permit standardization of the elutriation procedure and eliminate inter-run variability. We provide elutriation parameters for the cell cycle fractionation of a variety of cultured cell lines and suggest ways to improve the quality of the cell separations. In addition, we describe protocols for the fractionation of up to 3.50 × 108 cells in the small (JE-6B) Beckman elutriation system. This represents a four- to eight-fold increase in cell numbers over current cell fractionation procedures. Cell cycle populations containing >95% G1, >80% S, and >70% G2 M were consistently obtained using these protocols. Finally, we analyzed phase-enriched fractions from several cultured cell lines for the cell cycle regulation of the enzyme thymidine kinase. The data confirm previous findings that CCE is an excellent means of obtaining physiologically unperturbed cell cycle phase specific fractions.

Original languageEnglish (US)
Pages (from-to)41-46
Number of pages6
JournalAnalytical biochemistry
Issue number1
StatePublished - Nov 15 1990

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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