Glycosaminoglycan is mucopolysaccharide or an hetero polysaccharide
Glycosaminoglycans (GAGs) or mucopolysaccharides are anionic polysaccharides composed of a repeating disaccharide unit.
You can see the functions of GAGs in following articles:
https://www.sciencedirect.com/topics/neuroscience/glycosaminoglycans
https://onlinelibrary.wiley.com/doi/pdf/10.1038/npg.els.0000704
https://link.springer.com/chapter/10.1007/978-3-642-84318-1_1
https://www.ncbi.nlm.nih.gov/m/pubmed/25151376/
Thanks so much Dr Devi for your answer
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