An example of a complex eukaryotic KOG: globins and related hemoproteins. The systematic protein names of the KOG members are listed under each species. To the left of the KOG proper is the similarity dendrogram produced from the BLAST scores between the KOG members. This is a crude clustering, which should not be construed as a phylogenetic tree.
Tatusov et al. BMC Bioinformatics 2003 4:41 doi:10.1186/1471-2105-4-41