The document discusses methods for integrating different types of biological data to build networks that model signal transduction pathways. It describes using protein sequence motifs to predict kinase-substrate relationships, and combining this with protein interaction and expression data to provide context. Validation studies on ATM and Cdk1 signaling pathways showed this approach could accurately predict phosphorylation sites and the kinases that target them. Future work involves improving scoring methods and expanding to other types of post-translational modifications and model organisms.