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.
Wiegers et al. BMC Bioinformatics 2009 10:326 doi:10.1186/1471-2105-10-326