Genes clusters found using MCODE. Clusters found using MCODE are visualized as nodes arranged in four levels of decreasing node score cutoff (0.2-0.05) as a parameter for MCODE. Node size corresponds to the number of genes in the cluster. Overlapping clusters (that share genes) are connected by an edge, with edge thickness corresponding to overlap size, with the thickest lines indicating that 100% of the child cluster is present in the parent cluster. Node colour intensity corresponds to GO enrichment. Clusters that have no GO enrichment are brightest, while red clusters have close to 100% of the genes sharing an enriched GO term. For clusters with more then one enriched GO term, color intensity shows the percent of genes having the most abundant term. A green asterisk appears above GO-enriched clusters that were used for further analysis. The number besides the asterisk corresponds to the cluster number given in Tables 4 and 5, and in Figure 5. A green plus sign appears above a non GO-enriched cluster that is assigned a putative cell cycle regulation role (see Results and Figure 6).