Table 1.

Constraints for constructing two different classes of random networks that retain features of the causal structure of a reference cell-cycle network.

Erdös–Rényi (ER) networksscale-free (SF) networks
size of network (total number of nodes, inhibition and activation links)same as the cell-cycle networksame as the cell-cycle network
nodes with a self-loopsame as the cell-cycle networksame as the cell-cycle network
threshold for each nodesame as the cell-cycle networksame as the cell-cycle network
number of activation and inhibition links for each nodenot the same as the cell-cycle network (→no structural bias)same as the cell-cycle network (→SF structure)