2-D histograms of repressor mRNA number versus repressor protein number. Red indicates regions of large frequency (i.e., where the system spends a lot of time) and blue indicates regions of low frequency. Panel A is for the discrete system and Panel B is the hybrid model. Roughly 10, 000 oscillations were used to produce both plots.
Adalsteinsson et al. BMC Bioinformatics 2004 5:24 doi:10.1186/1471-2105-5-24