The VertiGO Browser. The VertiGO Browser uses the Gene Ontology (Camon et al. 2003) to display and highlight differences in the physiological capabilities among a set of bacteria. In the figure, the unusually large number of signal transduction proteins in the metal-reducing bacteria, D. vulgaris and Geobacter metallireducens, is evident when compared to other model organisms. Users can view any number of genomes in this way by selecting them from the menu at left, and navigate the GO hierarchy by clicking the boxes to the left of each term. In addition, users can retrieve all genes that match a particular GO annotation by clicking the number corresponding to the appropriate term and species (for terms with <200 genes).
