Largely through the work of Carl Woese and his colleagues at the University of Illinois, they are now generally recognized as being genetically and structurally distinct, and forming their own domain, Archaea.
Archaea were originally isolated from extreme environment, but it is now known that they can be found in all habitats, and may be up to 20% of global biomass; 30% of the marine microbes.
They lack peptidoglycan in their cell walls. They also have unusual (ether-linked) lipids in their cell membranes which are not found in any other group of organisms.
The structure and function of the genes in archaea are surprisingly similar to the structure and function of the genes in eukaryotes, while those of eubacteria are not. There are major differences, too, in some of the fundamental biochemical processes of metabolism between archaea and bacteria.
Largely through the work of Carl Woese and his colleagues at the University of Illinois, they are now generally recognized as being genetically and structurally distinct, and forming their own domain, Archaea.Archaea were originally isolated from extreme environment, but it is now known that they can be found in all habitats, and may be up to 20% of global biomass; 30% of the marine microbes.They lack peptidoglycan in their cell walls. They also have unusual (ether-linked) lipids in their cell membranes which are not found in any other group of organisms.The structure and function of the genes in archaea are surprisingly similar to the structure and function of the genes in eukaryotes, while those of eubacteria are not. There are major differences, too, in some of the fundamental biochemical processes of metabolism between archaea and bacteria.
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