Fig. 3.

Comparative genomic analysis between the Arctic thaumarchaeal metagenome and the three sequenced MGI Archaea to date. Nitrosopumilus maritimus SCM1, Candidatus N. limnia SFB1, and Candidatus C. symbiosum A were used to build OGs specific to Thaumarchaeota and, thereafter, the genes identified in Arctic Thaumarchaeota metagenome were assigned to these OGs. The numbers in parentheses represent the total number of OGs for the genomes or regions in the Venn. The large numbers in each region of the Venn represent OGs with functional annotation from eggNOG v2. OGs that did not occur in the Arctic thaumarchaeal metagenome and were shared among only two other genomes are hidden. Some OGs of interest have been highlighted in boxes. 3OHP/4OHB, 3 hydroxyproprionate/4 Hydroxybutyrate.