| Autor: |
O'Neill MA, Morris VJ, Selvendran RR, Sutherland IW, Taylor IT |
| Jazyk: |
angličtina |
| Zdroj: |
Carbohydrate research [Carbohydr Res] 1986 Apr 01; Vol. 148 (1), pp. 63-9. |
| DOI: |
10.1016/0008-6215(86)80037-4 |
| Abstrakt: |
The gelling polysaccharide produced by a species of Enterobacter (NCIB 11870) contains L-fucose, D-glucose, and D-glucuronic acid in the ratios 1:2:1. Analysis of the methylated and methylated, carboxyl-reduced polysaccharide revealed terminal non-reducing glucose, (1----3)-linked fucose, (1----3,1----4)-linked glucose, and (1----4)-linked glucuronic acid in the ratios 1:1:1.2:0.8. From the results of Smith degradation of the polysaccharide and spectroscopic studies of the acidic tetra- and octa-saccharides produced by bacteriophage-induced enzymic depolymerization of the polysaccharide, the following tetrasaccharide repeating-unit is proposed. (Formula: see text). This repeating-unit is identical to that of the capsular polysaccharide produced by Klebsiella aerogenes serotype K54 except for the absence of O-acetyl groups. The effects of the O-acetyl groups on the secondary structure and rheological properties of these polysaccharides are discussed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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