Trisaccharides, Mannose-containing

Determination of a Mannose-Containing Trisaccharide in the Urine of Patients and Heterozygotes of Mannosidosis... 

Norden, N.E. Lundblad, A. Svensson, S. Ockerman, P.A. Autio, S. A Mannose-Containing Trisaccharide Isolated from Urines of Three Patients with Mannosidosis. J. Biol. Chem. 1973, 10, 6210-6215. 

The synthesis of hexa- and nonasaccharides (8 ), the dimer and the trimer of the trisaccharide I may be presented as an example for the stepwise synthesis of the Salmonella newington polysaccharide which contains the repeating units I joined through the B-galactosyl 1— 6-mannose linkage (9 ). ... 

Xanthan, the best studied of the exopolysaccharides, provides a good example of the complexity and specificity of enzymatic attack. Xanthan has a P-l,4-glucosidic (Glu) backbone containing branch points at the 3-positions of every fourth unit. The branches are trisaccharides with a-1,2-mannose acetate, P-l,4-glucuronic acid and P-mannoside (Man) units. Each of the different main chain, branch and side chain bonds can be hydrolyzed by only a specific enzyme, as illustrated below ... 

The polysaccharide chain of the cell wall lipopolysaccharide of Escherichia coli 058 contains D-mannose, 2-acetamido-2-deoxy-D-mannose, 3-0-[(l R)-carboxyethyl)]-L-rhamnose (rhamnolytic acid), and 0-acetyl groups in the molar ratios of 2 1 1 . Structural investigations show that this polysaccharide, which contains a substituted trisaccharide repeating unit, has an identical structure (4) to that of Shigella dysenteriae type 5. 

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