Bistability versus Bimodal Distributions in Gene Regulatory Processes from Population Balance
Figure 7
Reaction network for gene regulation in toy example.
After uptake by membrane protein, the precursor of signal molecule matures into signal molecule. When signal molecule binds to DNA, it favors the expression of xp gene encoding product and represses the transcription of xi gene which encodes the inhibitor. The binding reaction of inhibitor to signal molecule is fast and irreversible so either signal molecule or inhibitor dominates.