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Pronunciation: mod'yu-la'shun


  1. The functional and morphologic fluctuation of cells in response to changing environmental conditions.
  2. Systematic variation in a characteristic (frequency, amplitude) of a sustained oscillation to code additional information.
  3. A change in the kinetics of an enzyme or metabolic pathway.
  4. The regulation of the rate of translation of mRNA by a modulating codon.

[L. modulor, to measure off properly]

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