Fig. 3.

Line graph illustrating the required minimum sparcity levels in order to create a connected sythetic structure to attach to the real portions of the gene co-expression networks. The x-axis shown the number of nodes used to construct the synthetic structure and the y-axis shows the minimum level of sparcity (numbers of edges connecting nodes of the synthetic structure) required to make a connected graph, i.e., there is only one component that includes all of the nodes in the synthetic structure