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Updated: Jun 27, 2026

Detection of Glycosaminoglycans by Polyacrylamide Gel Electrophoresis and Silver Staining
Published on: February 25, 2021
Keratan sulphate in the interglobular domain has a microstructure that is distinct from keratan sulphate elsewhere on
1University of Melbourne Department of Paediatrics and Murdoch Children's Research Institute, Arthritis Research Group, Royal Children's Hospital, Parkville, 3052, Australia. amanda.fosang@mcri.edu.au
Abstract:
The microstructure of keratan sulphate purified from the interglobular domain, the keratan sulphate-rich region and total aggrecan was compared using fluorophore-assisted-carbohydrate-electrophoresis. Keratan sulphate in the interglobular domain was substantially less sulphated than keratan sulphate elsewhere on aggrecan, based on the ratio of unsulphated: monosulphated disaccharides generated by endo-beta-galactosidase digestion, and the ratio of monosulphated: disulphated disaccharides generated by keratanase II digestion. The ratio of unsulphated: monosulphated: disulphated disaccharides was 1:4:5 for keratan sulphate from total aggrecan and the keratan sulphate-rich region, but only 1:0.9:0.8 for the interglobular domain. These results show that keratan sulphate in the interglobular domain of pig aggrecan has a microstructure that is distinct from keratan sulphate in the keratan sulphate-rich region.
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