Archaebacterial cell walls

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Archaebacterial cell walls show a great diversity in structure and composition, probably in response to the diversity of environments where most of these organisms live, many of them under extreme conditions of pH, temperature or salinity.

Four types of archaeobacterial wall have been defined:

  1. those made of pseudomurein, a heteropolymer that resembles peptidoglycan
  2. those made of methanochondroitin, a sulfated heteropolysaccharide similar to that found in animal connective tissue
  3. those made of glycoprotein (S-layer)
  4. those that completely lack a wall and are surrounded exclusively by the plasma membrane. Little information is available about archaeobacterial wall interactions with metal ions.
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