Differences in Gene Ontology representation between modules. All categories depicted are statistically over- or under-represented in module 6 and/or 7 relative to the appropriate genomic background. Asterisks indicate significance levels in module 6, while plus symbols (+) indicate significance in module 7. For example, genes involved in the cell cycle are significantly (P < 0.05) under-represented in module 7. */+, P < 0.05; **/++, P < 0.01; ***/+++, P < 0.001.