GOTaxExplorer's GUI. The screenshot shows the query interface with the results for the query "Which proteins with a PHP domain are annotated with DNA replication?" On the right side of the query interface is the graphical representation of the NCBI Taxonomy. The lower part shows the frame containing results from the current query.
Schlicker et al. Genome Biology 2007 8:R33 doi:10.1186/gb-2007-8-3-r33