Density Invariance of Cultured Chinese Hamster Cells with Stage of the Mitotic Cycle

  • Anderson E
  • Petersen D
  • Tobey R
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Abstract

Isopycnic banding of Chinese hamster line CHO cells in Ficoll gradients shows that a population in balanced, exponential growth is very homogeneous with respect to density, the coefficient of variation of the density distribution spectrum being less than 5% of the mean reduced density (i.e. density minus one). Similar measurements on synchronized cultures indicate that reduced density varies by less than 2% around the life cycle. The mean density of CHO cells in F-10 growth medium is calculated to be 1.051 after correction for osmotic effects of the Ficoll gradient. © 1970, The Biophysical Society. All rights reserved.

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Authors

  • E. C. Anderson

  • D. F. Petersen

  • R. A. Tobey

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