Furthermore, the gastrointestinal system disease cluster (Figure 6; blue) contained co-expression networks with the highest level of similarity with several pathways, e.g. the pathways responsible for renal cell carcinoma, colorectal cancer, pathogenic Escherichia coli infection, intestinal immune network for IgA production, and inflammatory bowel disease (Supplementary Table S7). The gene discussed is CD79A; the disease is inflammatory bowel disease.