Query: NC_014729:703000 Halogeometricum borinquense DSM 11551 chromosome, complete genome
Lineage: Halogeometricum borinquense; Halogeometricum; Halobacteriaceae; Halobacteriales; Euryarchaeota; Archaea
General Information: Isolation: Solar salterns of Cabo Rojo Puerto Rico; Temp: Mesophile; Temp: 40C; Habitat: Solar saltern. This organism is an extreme halophile and required a minimum of 8% NaCl for growth.
Subject: NC_007426:930357 Natronomonas pharaonis DSM 2160, complete genome
Lineage: Natronomonas pharaonis; Natronomonas; Halobacteriaceae; Halobacteriales; Euryarchaeota; Archaea
General Information: Isolated from Lake Gabara in Egypt. Extreme haloalkaliphilic archeon. Natronomonas pharaonis is able to survive at high salt and pH conditions which results in limited nitrogen availability through ammonium. In order to compensate for this, Natronomonas pharaonis has developed three systems to promote nitrogen assimilation: direct uptake of ammonia, uptake of nitrate, and uptake of urea. Another problem with high pH environments is the use of a proton gradient for the generation of ATP, which other alkaliphiles have adapted to by substitution of sodium ions for protons. However, this organism utilizes protons for ATP generation as determined by experimental data.