Halobacteria

Halobacteria
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Halobacteria, which grow in extremely salty water, are facultative aerobes, they can grow when oxygen is absent. Purple pigments, known as retinal (a pigment also found in the human eye) act similar to chlorophyll.

Haloferax volcanii is a salt-loving archaeon belonging to the family Halobacteriaceae. Halophilic archaea exhibit obligate halophilism and require 2-5 M salt concentration for viability.

Some archaea, most notably halobacteria, make proton gradients by pumping in protons from the environment with the help of the solar driven enzyme bacteriorhodopsin, ...

Contemporary species of Archeabacteria live in extreme conditions. The three major groups are halobacteria, sulphobacteria and methanogens. All other prokaryotes are grouped in Eubacteria. See Introduction to Archaea.

See also: Human, Membrane, Cell, Trans, Bacteria