KEY LIPID. “One of the most important attributes to the maintenance of homeostasis within the organism is that of the plasma membrane surrounding the organism. Archaean thermophiles, and also acidophiles, have membranes containing unique ether lipids. These tetraether lipids span the entire membrane forming a rigid monolayer that is impermeable to both ions and protons. Ether-type lipids, such as these, are much stronger than the ester-type lipids found in non-thermophilic Bacteria and Eukarya.”
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