Table 1 NAND Logic function for two repressors based on Eq. (19).

From: Nonlinear delay differential equations and their application to modeling biological network motifs

ηX

ηY

Z*

Z* for ηZ1,2 > 1

 ≪ 1

 ≪ 1

ηZ1 + ηZ2

>1

 ≪ 1

 ≫ 1

\({\eta }_{Z1}+{\eta }_{Z2}/{\eta }_{Y}^{{n}_{2}}\)

>1

 ≫ 1

 ≪ 1

\({\eta }_{Z1}/{\eta }_{X}^{{n}_{1}}+{\eta }_{Z2}\)

>1

 ≫ 1

 ≫ 1

0

<1