Figure 3From: Phylogenomic analysis of proteins that are distinctive of Archaea and its main subgroups and the origin of methanogenesisAn interpretive diagram showing the evolutionary stages where genes for different proteins that are specific for methanogenic archaea likely originated. The 10 proteins that are uniquely shared by A. fulgidus and various methanogenic archaea indicate that this lineage is the closest ancestor of all methanogens.Back to article page