Table 2.

Truth table of a PBN for the p53-Mdm2 network: x ₁ , x ₂ are the present states of p53 and Mdm2

x 1 x 2	${\mathit{f}}_{\mathbf{1}}^{\left(\mathbf{1}\right)}$	${\mathit{f}}_{\mathbf{2}}^{\left(\mathbf{1}\right)}$	${\mathit{f}}_{\mathbf{3}}^{\left(\mathbf{1}\right)}$	${\mathit{f}}_{\mathbf{4}}^{\left(\mathbf{1}\right)}$	${\mathit{f}}_{\mathbf{1}}^{\left(\mathbf{2}\right)}$	${\mathit{f}}_{\mathbf{2}}^{\left(\mathbf{2}\right)}$	${\mathit{f}}_{\mathbf{3}}^{\left(\mathbf{2}\right)}$	${\mathit{f}}_{\mathbf{4}}^{\left(\mathbf{2}\right)}$
00	1	1	1	0	0	0	0	1
01	1	1	0	0	0	0	1	1
10	0	0	1	1	1	1	0	0
11	0	1	1	1	1	0	0	0
${\mathit{c}}_{\mathit{j}}^{\left(\mathit{i}\right)}$	0.5	0.4	0.09	0.01	0.5	0.4	0.09	0.01

An internal entry indicates whether a logical 1 or 0 would result at the next state of a gene from a selected Boolean function. ${\mathit{c}}_{\mathit{j}}^{\left(\mathit{i}\right)}$ indicates the transition probability by a function ${\mathit{f}}_{\mathit{j}}^{\left(\mathit{i}\right)}$[24].