Archaea

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Archaea

Evolutionary biology
One of the three domains of living organisms: Archaea, Bacteria and Eukaryota. While Archaea are single-celled, they are unlike bacteria given their independent evolutionary history. Archaea differ from Eukaryota in their ribosomal structure and the presence—in some—of introns in the genome, as well as other features (e.g., different membrane composition).
 
Molecular biology
Archaea are of interest in biotechnology as they have unique biochemical features (e.g., enzymes of theromophiles, such as Taq polymerase, the “workhorse” enzyme of PCR) and are extremely stable at high temperatures. Archaea include metabolic oddities (e.g., extreme halophiles, which live in extremely salty environments), methanogens (which produce methane) and sulphur-dependant extreme thermophiles (which can live in extremely hot environments).

Archaea phyla
• Crenarchaeota
• Euryarchaeota
• Korarchaeota
• Nanoarchaeota
• Thaumarchaeota (recently proposed)

Archaea

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References in periodicals archive ?
Archea Ancient Art brings a vibrantly painted canopic chest used in ancient Egypt to contain internal organs during mummification (Fig.
An assistance mission to project management has been entrusted under a contract to the provider Archea Architects who follow the work subject of this consultation
Industrial Architecture - Antinori Winery by Archea Associati
Blanc PD, Eisner MD, Katz PP, Yen IH, Archea C, Earnest G, et al.
Reduced rumen methanogenesis could be linked to the role of sheanut tannins in reducing protozoa and/or methanogenic archea population (Bhatta et al.
Scientists say they suspect the Antarctic waters are supersaturated with oxygen and other gases and may be home to bacteria and single-celled microorganisms called archea.
These bacteria are metabolically more versatile than the archea and their enzymatic activity is more diverse [2,21].
In 1995, this program was used to find genes in the first completely sequenced genomes of bacteria and archea.
Proteases from different pathogenic organism like protozoa, fungi and archea were selected for predicting their 3-D structures.
Recent work has suggested that in at least some archea, the specific translation initiation mechanism depends on whether the gene in question is located internal to an operon or is an isolated gene or the first gene in an operon (Tolstrup et al.
Scientists identified a thermostable hydrolizing enzyme, b-glycosidase, from genetically modified hyperthermophilic Archea Sulfolobus solfataricus and Pyrococcus furiosus that grew in continuous fermentors.