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  • Title: Lipid-linked oligosaccharides containing glucose in lactating rabbit mammary gland.
    Author: Speake BK, White DA.
    Journal: Biochem J; 1978 Dec 15; 176(3):993-1000. PubMed ID: 747667.
    Abstract:
    1. Microsomal fractions of lactating rabbit mammary gland incubated with UDP-glucose formed lipid-linked mono- and oligo-saccharides. The lipid-linked monosaccharide had chromatographic properties similar to those of dolichol phosphate mannose and yielded glucose on acid hydrolysis. 2. Incubation of the microsomal fraction with GDP-[U14C]-mannose yielded an oligosaccharide lipid of approximately seven monosaccharide units. Further incubation with UDP-glucose increased the size of the oligosaccharide by approximately two units. 3. Explants of lactating rabbit mammary gland incorporated [U-14C]glucose into both lipid-linked mono- and oligo-saccharides. The oligosaccharide lipid was of approx. 11 monosaccharide units. 4. Considerable redistribution of radioactive label occurred in the explant system, and radioactively labelled glucosamine and mannose, as well as glucose, were detected on acid hydrolysis of the oligosaccharide lipid. 5. Glucose was also detected in the acid hydrolysate of explant proteins. Radioactive glucosamine, galactosamine, galactose and mannose were also found in this fraction.
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