Glycosaminoglycan - Definition

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Glycosaminoglycans, more simply called GAGs, are components of connective tissues. They represent 30% of the organic material of the body. There are seven different types, including chondroitin sulfate, found in cartilage, bones, or the cornea, dermatan sulfate in the dermis and tendons, and heparan sulfate in the liver, lungs, and aorta. The principal function of these polysaccharides is to retain water in the tissues, thus keeping them moist.