Glycosaminoglycans (GAGs) are long, unbranched polysaccharides consisting of repeating disaccharide units. These units typically comprise an amino sugar, such as glucosamine or galactosamine, and a uronic acid, like glucuronic acid or iduronic acid. GAGs are critical components of the extracellular matrix (ECM) and play a vital role in the structure and function of various tissues.
