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Monitoring of κ-carrageenan depolymerization by capillary electrophoresis and semisynthesis of oligosaccharide alditols. | LitMetric

Monitoring of κ-carrageenan depolymerization by capillary electrophoresis and semisynthesis of oligosaccharide alditols.

Carbohydr Polym

Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Zip Code 81.531-980, P.O. Box 19046, PR, Brazil. Electronic address:

Published: March 2019

AI Article Synopsis

Article Abstract

Different hydrolysis conditions to produce κ-carrageenan oligosaccharide alditols were studied and the depolymerization process monitored by capillary electrophoresis (CE). Semisynthesis, ion-exchange and exclusion chromatography were used to obtain and isolate sulfated di-, tetra- and hexasaccharide alditols, the last being fully characterized for the first time. Those derivatives were used as standards to validate a new quantitative CE analytical method which was used to compare two different partial hydrolysis methodologies: an acid hydrolysis followed by reduction and a one-pot reductive hydrolysis using 4-methylmorpholine borane. The resulting depolymerization profiles were quite different from each other. Optimal hydrolysis conditions to produce high yields of specific sulfated oligosaccharides as well as particular mixtures of oligosaccharide alditols were determined. Moreover, using the novel CE method, we were able to distinguish up to eight different oligosaccharides in the hydrolysate mixtures.

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Source
http://dx.doi.org/10.1016/j.carbpol.2018.12.054DOI Listing

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