title: LUCA, or just a conserved Archaeon?: comments on Xue et al.
abstract: In their recent paper, Xue et al. used an unusual technique of rooting the universal phylogenetic tree, which resulted in positioning of the last universal common ancestor within Archaea. The present paper brings some criticisms on the methods and results achieved.
authors.affiliation: Laboratory of Paleobiology and Paleoecology, IG ASCR, Rozvojova 135, Prague CZ-16502, Czech Republic. cej@gli.cas.cz
authors.forename: Peter A
authors.initials: PA
authors.lastname: Cejchan
mesh_terms: D001105:Archaea / Q000145:classification / Q000235:genetics*; D019143:Evolution, Molecular; D008957:Models, Genetic; D010802:Phylogeny; D012343:RNA, Transfer / Q000235:genetics*; D013045:Species Specificity
chemical_list: D012343:RNA, Transfer