Oscillatory features of the competition and non-competition designs associated to the studied circuit architecture. The parameter space (β, γ) and the values of the oscillation period for (A) Design I and (B) Design III. The color code represents the period of oscillations depending on the (β, γ) pair, with α = 50, Δ = 10, σ = 1. Dark blue implies no sustained oscillations. As defined in the main text, the period in the color bar is expressed in units of δ
, the degradation rate of the repressor.