Query: NC_013967:2760473 Haloferax volcanii DS2 chromosome, complete genome
Lineage: Haloferax volcanii; Haloferax; Halobacteriaceae; Halobacteriales; Euryarchaeota; Archaea
General Information: Haloferax volcanii DS2 was isolated from bottom sediments from the Dead Sea. Halophilic archaeon. This organism is similar to halobacteria and was originally classified in that genus. It has an optimum requirement for sodium chloride in the 1.7-2.5 molar which is half that generally associated with other halobacterium species.
Subject: NC_010556:6612 Exiguobacterium sibiricum 255-15, complete genome
Lineage: Exiguobacterium sibiricum; Exiguobacterium; Bacillales Family XII; Bacillales; Firmicutes; Bacteria
General Information: This organism was isolated from a 2-3 million-year permafrost core in Siberia, Russia and can survive and grow rapidly at low temperatures. Analysis of long-term survival of psychrophilic organisms such as this one may aid understanding of the potential growth of organisms in astrobiology. Exiguobacterium sibiricum is a psychrotolerant organism able to grow at temperatures that range from -6 to 40 degrees C. This organism is also able to survive repeated freeze/thaw cycles which may contribute to its ability to survive in cold environments.