Parsimonious scenarios of loss and emergence of genes (KOGs) in eukaryotic evolution

Copyright information: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. The coelomate topology of the phylogenetic tree of the eukaryotic crown group. The ecdysozoan topology of the phylogenetic tree of the eukaryotic crown group. The numbers in boxes indicate the inferred number of KOGs in the respective ancestral forms. The numbers next to branches indicate the number of gene gains (emergence of KOGs) (numerator) and gene (KOG) losses (denominator) associated with the respective branches; a dash indicates that the number of losses for a given branch could not be determined. Proteins from each genome that did not belong to KOGs as well as LSEs were counted as gains on the terminal branches. The species abbreviations are as in Figure .