Table 4.

Transcription, self-degradation, and coupled degradation functions.

Constant	Exponential	Log
${10}^{-3}$ ${10}^{-2}$ ${10}^{-1}$ 1 10 ${10}^2$ ${10}^3$	$e^t$ $e^{-{10}^2{\left(t-2\right)}^2}$ $e^{-{\left(t-2\right)}^2}$ $e^{3-t}+e^{-1+t}$ $0.5(e^{3-t}+e^{-1+t})$ $\frac{e^{-{\left(t-2\right)}^2}}{0.05+{\left(t-2\right)}^2}$ $e^{\frac{t}{2}}\left|\sin \left(\pi t\right)\right|$	$\log \left(1+t\right)$ $\frac{1}{\log \left(5\right)-\log \left(1+t\right)}$
		Epigenetic
		$1+\frac{1}{2-10^{-1}\left(t\right)}$
		Experimental
		$0.5\left[Tanh\left(\frac{xy-0.5}{0.2}\right)+1\right]$ $Tanh\left(\frac{xy-0.5}{0.2}\right)+1$