Mercury reductase was found upregulated in Sulfolobus solfataricus and was needed for mercury resistance [116], and mercury volatilization was also measured from Halococcus,
Halobacterium, and, to a lesser extent, Haloferax [117].
And they can reassemble their entire chromosome and put it back into working order within several hours," says Adrienne Kish, member of the research group studying
Halobacterium at the University of Maryland.
Not all of the archae, especially
Halobacterium and to a lesser extent Thermoplasma acidophilum and Aeropyrum pernix, have a clearly defined SD region.
Most haloarchaeal shuttle vectors are derived from endogenous plasmids, such as pGRB1 [7], pHH1 [8], and pNRC100 [9] from
Halobacterium salinarum or pHK2 [4,10], pHV2 [11, 12], and pHV1/4 [13] from Haloferax volcanii.
And the DNA sequence of the archaeon
Halobacterium halobium may help identify enzymes that function under high-salt conditions.
Bacteriorhodopsin is found in the intensely purple cell membrane of a bacterium called
Halobacterium salinarium, which grows in salt marshes.
One source of bR is in the purple membranes of several species of bacteria, most notably
Halobacterium halobium (hh).
In order to find EPSs with novel and valuable properties, several EPSs from haloarchaea have been isolated and investigated, such as Haloferax, Halococcus, Haloarcula, Natronococcus, Haloterrigena, and
Halobacterium [8-12].
A novel process involving what appears to be exchange of plasmids by partial cell fusion has been observed in
Halobacterium volcanii (16), and exchange of genetic markers has also been reported in Sulfolobus acidocaldarius (17).
Included in this group might be storage in protein bacteriorhodopsin, the living scum (
Halobacterium halobium) found off San Francisco Bay, and multiwavelength storage using strands of human DNA molecules.