CS is an acidic mucopolysaccharide found in large quantities in Marine Animals. It is composed of alternating residues of the disaccharide unit D-glucuronic acid (GlcA) and N-acetyl-D-galactosamine (GalNAc). The C-4 or C-6 of GalNAc and the C-2 and/or C-3 of the GlcA can introduce different units or different numbers or positions of sulfate groups for modification. About 25 CS disaccharides are depending on the number and position of the sulfate groups. CD BioGlyco is a leader in Marine Biomolecule Production. Whether you need CS or Fucosylated Chondroitin Sulfate, our professional Marine Carbohydrate Production specialists provide you with high-purity production services.
Technology: Ultraviolet-visible (UV-vis) spectroscopy, Nuclear magnetic resonance (NMR) spectroscopy, HPLC, Size exclusion chromatography-multiangle laser light scattering (SEC-MALLS)
Journal: International Journal of Molecular Sciences
Published: 2016
IF: 4.9
Results: In this study, researchers prepared low molecular weight CS (LMWCS) from different sources (shark cartilage, porcine cartilage, and bovine cartilage) using acid extraction, enzymatic extraction, microwave-assisted alkaline extraction, and oxidative methods, respectively. Structural characterization revealed that chondroitin-2,6-sulfate and chondroitin-4,6-sulfate are the unique structural features of CS from shark sources. Moreover, the researchers confirmed that LMWCS from shark cartilage prepared by oxidative degradation plays a key role in osteoarthritis therapy.
Fig.1 Characterization of LMWCS from different sources. (Li, et al., 2016)
What is the principle of alkaline extraction of CS?
In the presence of a base, CS undergoes a β-elimination reaction with the protein-bound O-glycosidic bond, from which it is released when the glycopeptide bond is broken.
Why is it necessary to analyze the disaccharide unit of CS?
The position and number of substitutions of the sulfate groups in CS from different sources give CS a wide variety of structures. To elucidate the type of CS, the disaccharide composition of the sugar chain must be analyzed. HPLC analysis of a mixture of disaccharides gives an indication of the type and amount of disaccharide contained in the CS from the chromatogram obtained. In addition to HPLC analysis, the NMR technique can also be used. CS samples do not require enzymatic digestion and the structure of the disaccharide is determined by measuring the chemical shifts of C and H on the sample.
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