Figure 1From: Text mining and manual curation of chemical-gene-disease networks for the Comparative Toxicogenomics Database (CTD)CTD curated data relationships. Biocurators capture three types of data relationships from the literature using controlled vocabularies, including chemical-gene interactions, and chemical-disease and gene/protein-disease relationships. These three relationships generate a chemical-gene/protein-disease triad that enables users to infer novel connections between all three actors.Back to article page