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Example sentences for: euryarchaeota
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Data from the following species were assembled into presumptive orthology groups (hereafter, proteins) and aligned [ 36 ] : Aquifex aeolicus , Bacillus subtilis , Borrelia burgdorferi , Chlamydia trachomatis , Escherichia coli , Haemophilus influenzae , Helicobacter pylori, Mycobacterium tuberculosis, Mycoplasma genitalium, Mycoplasma pneumoniae , Rickettsia prowazekii, Synechocystis sp., and Treponema pallidum (Eubacteria), Archaeoglobus fulgidus, Methanobacterium thermoautotrophicum, Methanococcus jannaschii, Pyrococcus abyssi , and P. horikoshii (Archaebacteria: Euryarchaeota), and Arabidopsis thaliana, Caenorhabditis elegans, Dictyostelium discoideum, Drosophila melanogaster, Gallus gallus, Homo sapiens, Mus musculus, Oryza saticva, Plasmodium falciparum, Saccharomyces cerevisiae, Schizosaccharomyces pombe, Trypanosoma sp. , and Xenopus laevis (Eukaryota).
It is further notable that, in this tree, the two representative of Crenarchaeota ( A. pernix and S. solfataricus ) do not comprise a sister group of the Euryarchaeota (the remaining archaeal species), but rather for am branch within the Euryarchaeal cluster (see discussion below).
This indicates that the lineage of archaebacteria leading to the eukaryote nuclear genome diverged prior to the split between the Crenarchaeota and Euryarchaeota.
These types of patterns of conservation and variation transcend all levels of the phylogenetic tree and result in features in the rRNA sequences and structures that are characteristic for each of the phylogenetic groups at each level of the phylogenetic tree ( e.g., level one: Bacterial, Archaea, Eucarya; level two: Crenarchaeota, Euryarchaeota in the Archaea; level three: gamma, alpha, beta, and delta/epsilon subdivisions in the Proteobacteria).
All methods of tree analysis applied here also challenge the traditional division of the archaeal kingdom into Euryarchaeota and Crenarchaeota, suggesting instead that Euryarchaeota could be a paraphyletic group with respect to Crenarchaeota, or in other words, that Crenarchaeota might have evolved from within the Euryarchaeota.
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