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  • Title: Occurrence of monoacyl-diglucosyl-diacyl-glycerol and monoacyl-bis-glycerophosphoryl-diglucosyl-diacyl-glycerol in membranes of Acholeplasma laidlawii strain B-PG9.
    Author: Andersson AS, Rilfors L, Lewis RN, McElhaney RN, Lindblom G.
    Journal: Biochim Biophys Acta; 1998 Jan 05; 1389(1):43-9. PubMed ID: 9443602.
    Abstract:
    It is shown by thin-layer and high-performance liquid chromatography that the two membrane lipids monoacyl-diglucosyl-diacyl-glycerol (MADGlcDAG) and monoacyl-bis-glycerophosphoryl-diglucosyl-diacyl-glycerol are synthesized by Acholeplasma laidlawii strain B-PG9 when the cells are grown in two different growth media. The two lipids are also synthesized by A. laidlawii strain A-EF22 and their chemical structures have been determined previously by NMR spectroscopy. Since a reversed hexagonal phase is the only liquid-crystalline phase formed by MADGlcDAG, it is concluded that A. laidlawii strain B-PG9, in resemblance to strain A-EF22, synthesizes three membrane lipids that are able to form reversed nonlamellar phases. A comparison of the membrane lipids from the two strains shows that there is essentially one lipid from each strain that differs. However, both these lipids have common physico-chemical properties, namely the ability to form reversed nonlamellar phases. Finally, it is also shown that novel lipids may be synthesized by A. laidlawii through long-time adaptation to altered growth conditions.
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