Figure 1.

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
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