Archeal cell membrane Characteristics Chirality of

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Archeal cell membrane Characteristics Chirality of glycerol : While bacteria and eukaryotes have D-glycerol in their membranes, archaeans have L-glycerol in theirs. Ether linkage : When side chains are added to the glycerol, most organisms

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Archeal cell membrane<br>
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Characteristics Chirality of glycerol : While bacteria and eukaryotes have D-glycerol in their membranes, archaeans have L-glycerol in theirs.

Ether linkage : When side chains are added to the glycerol, most organisms bind them together using an ester linkage (see diagram above). The side chain that is added has two oxygen atoms attched to one end. One of these oxygen atoms is used to form the link with the glycerol, and the other protrudes to the side when the bonding is done. By contrast, archaeal side chains are bound using an ether linkage, which lacks that additional protruding oxygen atom. This gives the resulting phospholipid different chemical proerties from the membrane lipids of other organisms.<br>
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Ether linkage Isoprene unit<br>