Figure 2. Change in transcript abundance per cell, X(t), through multiple cell cycles.

Both dividing and resting cells are treated with a transcription blocking agent as in Figure 1. X(t) oscillates between a high and low value in each cycle which quickly converges to X_H and X_L defined by Eqs (3–6). Black and blue lines trace X(t) for resting and dividing cells respectively. In the inset, the red line trace cells that divide at 1/3 of the maximal rate.