scholarly journals 4-O-(1-carboxyethyl)-l-rhamnose, a second unique acidic sugar found in an extracellular polysaccharide from Butyrivibrio fibrisolvens strain 49

1990 ◽  
Vol 268 (2) ◽  
pp. 281-285 ◽  
Author(s):  
R J Stack ◽  
D Weisleder
Keyword(s):  
Chemical Ionization ◽  
Extracellular Polysaccharide ◽  
Spectroscopic Studies ◽  
Chemical Degradation ◽  
Ionization Mass ◽  
Unknown Compound ◽  
Butyrivibrio Fibrisolvens ◽  
Neutral Sugars ◽  
Acidic Component ◽  
Unknown Structure

Butyrivibrio fibrisolvens strain 49 excretes a polysaccharide that contains D-glucose, D-galactose, 4-O-(1-carboxyethyl)-D-galactose, and an acidic component of previously unknown structure. We report here the identity of the unknown as 4-O-(1-carboxyethyl)-L-rhamnose. The structure of this previously unknown compound was deduced from (1) comprehensive electron-impact and chemical-ionization mass-spectroscopic studies of differentially labelled derivatives prepared from the unknown, (2) 13C-n.m.r. and 1H-n.m.r. studies of purified neutral sugars derived from the unknown and (3) chemical degradation experiments.

scholarly journals 4-O-(1-carboxyethyl)-d-galactose. A new acidic sugar from the extracellular polysaccharide produced by Butyrivibrio fibrisolvens strain 49

1988 ◽  
Vol 256 (3) ◽  
pp. 769-773 ◽  
Author(s):  
R J Stack ◽  
T M Stein ◽  
R D Plattner
Keyword(s):  
Extracellular Polysaccharide ◽  
Chemical Degradation ◽  
Butyrivibrio Fibrisolvens ◽  
Degradation Studies

The structure of a new acidic sugar from the extracellular polysaccharide of Butyrivibrio fibrisolvens strain 49 was determined as 4-O-(1-carboxyethyl)-D-galactose on the basis of 13C-n.m.r. and 1H-n.m.r. spectroscopy, m.s. and chemical degradation studies.

scholarly journals 2-O-methyl-D-glucuronic acid, a new hexuronic acid of biological origin

1976 ◽  
Vol 155 (1) ◽  
pp. 181-185 ◽  
Author(s):  
J H Kieras ◽  
F J Kieras ◽  
D V Bowen
Keyword(s):  
Chemical Ionization ◽  
Glucuronic Acid ◽  
Extracellular Polysaccharide ◽  
Red Alga ◽  
British Library ◽  
Ionization Mass ◽  
Biological Origin ◽  
Hexuronic Acid ◽  
Authentic Compound ◽  
Hydrolysis Of

Acid hydrolysis of the extracellular polysaccharide of Porphyridium cruentum (a unicellular red alga) produced a mixture of aldobiuronic acids and free hexuronic acids. Fractionation of this mixture on an ion-exchange column yielded a hexuronic acid characterized as the title compound. Its identity was confirmed by chromatographic comparisons with the authentic compound, by reduction to the corresponding methylated aldose, by resistance to controlled lead tetra-acetate oxidation and by chemical-ionization mass spectrometry. Complete spectra have been deposited as Supplementary Publication SUP50062 (7 pages) with the British Library (Lending Division), Boston Spa, Wetherby, W. Yorkshire LS23 7BQ, U.K., from whom copies may be obtained under the terms given in Biochem. J. (1976) 153, 5.

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