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Entrainment of a free-running oscillator (Tfr = 24.6 hr) to an external periodic stimulation of the protein degradation rateqP from 0.21 into 0.42 for 1 hr (black bars) with stimulus periodTstim = 24.0 (top panel) or Tstim = 28.0 hr (bottom panel). Note the onsets of entrainment of the protein oscillation (continuous line). The unperturbed free-running oscillations (24.6 hr) are included for reference (dashed line).
