Figure 2From: Comparative genomics of archaea: how much have we learned in six years, and what's next?Functional breakdown of genes within the conserved archaeal core. 'Universal' indicates genes with orthologs in both bacteria and eukaryotes; 'eukaryotic', genes with orthologs only in eukaryotes; 'bacterial', genes with orthologs only in bacteria; 'archaeal', genes without non-archaeal orthologs. The data on orthology and functional classification are derived from the COGs.Back to article page