(C) Posterior parameter estimates. Burst frequency is plotted as a function of time, where the solid line represents the posterior mean and the shaded area represents the 90% confidence interval. Posterior probability densities are shown for the average burst size, β (which controls the dependence between burst size and cell area) and ρ (representing the correlation in burst size between genes (in log space)), where β is inferred from model M2 and the average burst size and ρ are calculated from model M4. 