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glycosaminoglycan

biochemistry
Also known as: mucopolysaccharide, proteoglycan

Quick Summary

Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are a type of polysaccharide. They are derived from amino hexoses and are key components of mucoproteins, glycoproteins, and blood-group substances.1

GAGs are large, acidic molecules found in the extracellular matrix of animal tissues. They are responsible for the gel-like quality of this matrix and play a role in organizing its components. GAGs bind to a significant amount of water, forming swollen gels that fill the spaces between cells. This property contributes to the firmness and resilience of tissues like cartilage. Examples of GAGs include hyaluronic acid and chondroitin sulfate.234

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