Analysis of unsaturated disaccharides from glycosaminoglycuronan by high-performance liquid chromatography

Analytical Biochemistry
K YoshidaK Tokuyasu

Abstract

A rapid and simple analytical method for unsaturated disaccharide isomers formed by enzymatic digestion from hyaluronic acid, chondroitin sulfate, dermatan sulfate, heparan sulfate, and heparin by high-performance liquid chromatography using an amine-bound silica column with a linear gradient of sodium dihydrogen phosphate was developed. The analyses were performed on isomers of two groups belonging to the chondroitin sulfate family and the heparin sulfate family. In both families, disaccharide isomers eluted in the order non-, mono-, di-, and trisulfated disaccharides by elevating salt concentrations. The method was applied to the analysis of constituent disaccharides of representative sulfated glycosaminoglycans, which proved that most constituents could be quantified separately. This method is advantageous in that enzymatic digests can be applied directly on a column without any pretreatment and good resolution of several disaccharides can be obtained by one chromatography.

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