Dragon and Dragon View: Methods for the Annotation, Analysis, and Visualization of Large-Scale Gene Expression Data. Database Referencing of Array Genes ONline (DRAGON) is a database system that consists of information derived from publicly available databases, including UniGene, Swiss Prot, Pfam, and the Kyoto Encyclopedia of Genes and Genomes (KEGG). Through a Web-accessible interface, DRAGON rapidly supplies information pertaining to a range of biological characteristics of all the genes in any large-scale gene expression dataset. The subsequent inclusion of this information during data analysis allows for deeper insight into gene expression patterns. A related set of visualization tools called DRAGON View has been developed to allow for the analysis of large-scale gene expression datasets in relation to biological characteristics of gene sets