Figure 5

Effects of promoter leakage on the time-dependent number of gene product molecules, where the leakage rate is set as either λ ₀ = 0 (A, B) or λ ₀ = 10 (D, E). (A and D) no feedback, where the parameter values are the same as those used in Figure 3(A); (B and E) negative feedback, where the parameter values are the same as those used in Figure 3(B); (C and F) positive feedback, where the leakage rate λ ₁ is set as 10 for (F) or as 0 for (C), and the other parameter values are the same as those used in Figure 3(C).