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  • Title: Studies on glycosphingolipids in larvae of the green-bottle fly, Lucilia caesar: two neutral glycosphingolipids having large straight oligosaccharide chains with eight and nine sugars.
    Author: Sugita M, Inagaki F, Naito H, Hori T.
    Journal: J Biochem; 1990 Jun; 107(6):899-903. PubMed ID: 2391351.
    Abstract:
    Two neutral glycosphingolipids having large straight oligosaccharide chains with eight and nine sugars, provisionally named COS and CNS, were isolated and purified from larvae of the green-bottle fly, Lucilia caesar, as the only two remaining unidentified significant neutral glycolipids in this organism. From the results of sugar analysis, permethylation, negative-ion fast atom bombardment mass spectroscopy (FAB-MS), and 1H-NMR studies, the structures of the two glycolipids are proposed to be: COS, GalNAc beta 1-3GlcNAc beta 1-3Gal beta 1-3GalNAc alpha 1-4GalNAc beta 1-4GlcNAc beta 1-3Man beta 1-4Glc beta 1-Cer; and CNS, Gal beta 1-3GalNAc beta 1-3GlcNAc beta 1-3Gal beta 1-3GalNAc alpha 1-4GalNAc beta 1-4GlcNAc beta 1-3Man beta 1-4Glc beta 1-Cer. The fatty acid and long-chain base compositions of the above glycolipids were very similar, and were dominated by arachidic acid, and tetradeca- and hexadeca-4-sphingenines. The great similarity between the compositions of their ceramide moieties suggests that COS may be a precursor in the glycosylation reaction yielding CNS.
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