Figure 5

Probability of RNAP-promoter interaction. A, activator sites, at RNAP concentration equal to K _p of promoters, at four TF concentrations; B, repressor sites at RNAP concentration equal to K _p of promoters, at four TF concentrations; C, activator sites, at TF concentration equal to K _d of sites, at four RNAP concentrations; D, repressor sites, at TF concentration equal to the K _d of sites, at four RNAP concentrations.