Bode plot of simple gene regulation.

There are three plots with p_y = 0.02 min⁻¹ and p_xy = 10 (red), 1 (green), and 0.1 (blue) min⁻¹. On the horizontal axis, [rad/min] is used for the unit of angular frequency ω and [min] is used for the unit of equivalent period T (T = 2π/ω). The vertical axis represents the magnitude by which the system amplifies or reduces the input. The magnitude is shown in both folds (M) and dB (20log₁₀M). The figure illustrates that simple gene regulation can either amplify or reduce intrinsic noise, extrinsic noise, and periodic DNA replication-dependent oscillations depending on the value of p_xy.