A hierarchical structure formed by HCG-10 and its descendant clusters, where most of the genes belonging to HCG-10 are annotated as

<p><b>Copyright information:</b></p><p>Taken from "Hierarchical classification of functionally equivalent genes in prokaryotes"</p><p></p><p>Nucleic Acids Research 2007;35(7):2125-2140.</p><p>Published online 11 Mar 2007</p><p>PMCID:PMC1874638.</p><p>© 2007 The Author(s)</p> Each rectangular or circular node corresponds to a cluster, whereas a triangular node represents a group of genes that cannot be further clustered. The shape of a node reflects whether the cluster contains multiple genes from the same genome, with the rectangular standing for and the circular standing for . The color of a node reflects the taxonomic lineages of the genomes being covered by the cluster, where a solid color represents that all the genomes being covered belong to the same taxonomic lineage for which the color stands, and a color with white interior represents that most (but not all) of the genomes being covered belong to the taxonomic lineage for which the color stands. The annotations accompanying the clusters are summarized from the NCBI annotations of the genes being included