Figure 2.

CTD Tetramers query page. CTD’s new tool CTD Tetramers (http://ctdbase.org/query.go?type=tetramer). Users simply enter at least 1 data type of interest in either the chemical, gene, phenotype, and/or disease query boxes. The “Select” pop-up windows allow users to first survey terms from the available vocabularies for each data type. As well, users can filter to retrieve either direct or hierarchical relationships for chemicals, phenotypes, and diseases. A toggle box at the top (“What is a CTD Tetramer?”) provides additional information about how tetramers are computed and how to use the tool.