Interrogation of the underlying expression profiles allows regions of the graph to be associated with specific tissues or cell types.

<p><b>A</b> A three-dimensional visualisation of a Pearson correlation gene to gene network graph (<i>r</i> = 0.75, MCLi = 2.2). Samples of each tissue and cell type from each breed and developmental stage are averaged across individuals for ease of visualisation. Histograms of the averaged expression profile (averaged across individuals for each tissue and cell type for ease of visualisation) of genes in selected clusters are given on the right: <b>B (i)</b> profile of cluster 5 genes whose expression is highest in macrophages; <b>(ii)</b> profile of cluster 7 genes whose expression is highest in fetal ovary and testes; <b>(iii)</b> or a broader expression pattern associated with a cellular process e.g. oxidative phosphorylation (cluster 15). Note that there may be a degree of variation in the expression pattern of individual genes within a cluster which is masked when average profiles are displayed.