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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Biosynthesis and characterization of lipid-linked sugars and glycoproteins in aorta.

A particulate enzyme from bovine aorta catalyzes the incorporation of mannose from GDP-D-[14C]mannose into three products as follows: 1. Most of the radioactivity which is incorporated in short term incubations is into a product that is soluble in CHCl3/CH3OH (2/1, v/v). This product was purified by chromatography on DEAE-cellulose and Sephadex LH-20. The purified glycolipid was stable to alkaline saponification but released [14C]mannose when subjected to mild acid hydrolysis (1/2 = 7 min at 100 degrees in 0.01 N HCl). The purified glycolipid had the same mobility on silica gel plates in an acidic, basic, or neutral solvent system as did glycolipid had the same mobility on silica gel plates in an acidic, basic, or neutral solvent system as did authentic dolichyl mannopyranosyl phosphate. The synthesis of the 14C-mannolipid was reversed by the addition of GDP and Mg2+. 2. [14C]mannose is also incorporated, although at a slower rate into products which are soluble in CHCl3/CH3OH/H2O (1/1/0.3, v/v). When the 1/10.3 soluble material was chromatographed on Avicel plates, it gave rise to three distinct radioactive bands which appear to be lipid-linked oligosaccharides. Mild acid hydrolysis of the 1/10.3 soluble material released water-soluble, neutral 14C-oligosaccharides which eluted from Sephadex G-50 in two or three peaks between the standards cytochrome c and GDP-mannose...[1]

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