Table 3.

List of places and the initial numbers of tokens. We specified and assigned to places three different values approximating the actual concentration of the molecules, complexes and receptors in the model [36,37,38]. Those values reflect the following relationships: 1000—high concentration, 100—medium concentration, 100—low concentration, 0—very low concentration or absence. The concentrations are given in units of $pM={10}^{-12}M$.

Place	Initial Number of Tokens	Place	Initial Number of Tokens	Place	Initial Number of Tokens	Place	Initial Number of Tokens
$p_0$	0	$p_{14}$	0	$p_{28}$	100	$p_{42}$	0
$p_1$	100	$p_{15}$	0	$p_{29}$	0	$p_{43}$	0
$p_2$	100	$p_{16}$	0	$p_{30}$	0	$p_{44}$	1000
$p_3$	0	$p_{17}$	0	$p_{31}$	0	$p_{45}$	0
$p_4$	100	$p_{18}$	1000	$p_{32}$	0	$p_{46}$	100
$p_5$	100	$p_{19}$	100	$p_{33}$	0	$p_{47}$	10
$p_6$	1000	$p_{20}$	100	$p_{34}$	0	$p_{48}$	10
$p_7$	10	$p_{21}$	100	$p_{35}$	0	$p_{49}$	100
$p_8$	1000	$p_{22}$	100	$p_{36}$	0	$p_{50}$	0
$p_9$	10	$p_{23}$	0	$p_{37}$	10	$p_{51}$	0
$p_{10}$	0	$p_{24}$	10	$p_{38}$	0	$p_{52}$	0
$p_{11}$	0	$p_{25}$	10	$p_{39}$	10	$p_{53}$	100
$p_{12}$	0	$p_{26}$	0	$p_{40}$	0	$p_{54}$	100
$p_{13}$	100	$p_{27}$	100	$p_{41}$	100	$p_{55}$	100