Correspondence between eukaryotic and prokaryotic orthologous gene sets

<b>Copyright information:</b>Taken from "A comprehensive evolutionary classification of proteins encoded in complete eukaryotic genomes"Genome Biology 2004;5(2):R7-R7.Published online 15 Jan 2004PMCID:PMC395751.Copyright © 2004 Koonin et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL. Representation of prokaryotic counterparts in different subsets of KOGs. CGA, crown group ancestor; non-CGA, KOGs not represented in the crown group ancestor; MSP, metazoa-specific KOGs. Evidence of ancient duplications of eukaryotic genes revealed by the KOGs against COGs comparison. The connections between KOGs and COGs detected by using RPS-BLAST (see text) were analyzed by single linkage clustering.