Figure 3.

Protein and mRNA time courses in the TT module, portraying TF (A and B) multimodal behavior and (C and D) bust-like synthesis, using a feedback of α = 10¹³ in parameter set 2 and initial TF level of 100 molecules. FSP analysis (E), with fixed feedback α = 10¹⁰ (solid line) and α = 10¹⁵ (dotted line). Probabilities are evaluated for times between 10² and 10¹⁵ s, time represented in log scale. Labels refer to the probability of having 0 (cross), 1 (circle), and 2 (dot) molecules of mRNA, respectively.