Fragmentation oligosaccharides

Galactomannans and oligosaccharide fragments are susceptible to hydrolysis by a number of enzymes, including a-D-galactosidase90 (EC 3.2.1.22), /S-D-mannanase, exo-/3-D-mannanase,91 /3-D-mannosidase, and exo-/3-D-mannan mannobiohydrolase (EC 3.2.1.100).92 Early applications of enzymic... 

Thus, the increased platelet adhesion observed upon heparinization is a consequence of the enrichment of the surface of a HCP by fibrinogen 108,. Fibrinogen, as was already stated above, may specifically interact via its oligosaccharide fragments with the enzymes of the platelet membrane. 

The main approaches used for identification of natural isomers of 5,7-diamino-3,5,7,9-tetradeoxynon-2-ulosonic acids and determination of structures of bacterial poly- and oligosaccharides-containing derivatives of these sugars were H and 13C NMR spectroscopy. This could be applied to both intact natural glycopolymers and carbohydrate portions obtained after delipidation of LPS as well as to oligosaccharide fragments and... 

Analyses of the hemicelluloses of woods indicate the presence of a high proportion of D-xylose residues in association with those of a methyl ether of a hexuronic acid.64 The first evidence for the chemical structure of such wood xylans came from the isolation of xylobiose, xylotriose,65 and the aldobiouronic acid 0-(4-0-methyl-a-D-glucosyluronic)-(l —> 2)-D-xylose acid (IX)22 from partial hydrolyzates of aspen wood. The role of such oligosaccharide fragments in wood xylans became more apparent as the result of a study of a xylan from European beechwood,26 in which it was shown... 

One of the strategies employed to obtain sequence information in the study of plant polysaccharides is to hydrolyze the polysaccharide partially and elucidate the structures of the separated oligosaccharide fragments. Frequently, only small quantities of oligosaccharides were obtained in such studies, and identification was accomplished on the basis of comparisons with authentic reference samples. As the latter were not always readily available, Dutton s group embarked on a program... 

Protein Conjugates of Synthetic Oligosaccharide Fragments of Dextrans... 

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