tag:blogger.com,1999:blog-37148773.post6594881121707171292..comments2024-03-19T00:24:23.577-04:00Comments on <center>Sandwalk</center>: Monday's Molecule #175Larry Moranhttp://www.blogger.com/profile/05756598746605455848noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-37148773.post-63178127309893057412012-06-26T13:57:27.767-04:002012-06-26T13:57:27.767-04:00I've seen reviews asserting that the stereoche...I've seen reviews asserting that the stereochemical difference is the most basic, and that there are exceptions to distinctions involving the isoprenyl chains and ether linkages. Is that accurate?Ben Murraynoreply@blogger.comtag:blogger.com,1999:blog-37148773.post-3707067330011886782012-06-25T12:57:01.255-04:002012-06-25T12:57:01.255-04:00It is a membrane lipid of archaea. It differs from...It is a membrane lipid of archaea. It differs from classical phospholipids from bacteria or eucaryotes by:<br />- having prenyl (geranylgeranyl) chains instead of acyl chains<br />- having ether bonds instead of ester bonds<br />having the phosphate in position 1 instead of 3Jean-Marc Neuhaushttp://www.unine.ch/lbmcnoreply@blogger.comtag:blogger.com,1999:blog-37148773.post-43519216236926759162012-06-25T11:02:57.755-04:002012-06-25T11:02:57.755-04:00Molecule #175 is a generic image representing the ...Molecule #175 is a generic image representing the phospholipids that constitute the membranes of organisms of the domain Archaea. They differ from the membrane phospholipids of other organisms because: 1) The stereochemistry of the glycerol unit is reversed (Archaea use L-Glycerol), 2) Instead of fatty acids Archaea use isoprene-derived branched long chains 3) these chains are not carboxylic acids, but alcohols and therefore glycerol is bound to them as ethers, not esters.Raul A. FĂ©lix de Sousanoreply@blogger.com