Tuesday, February 3, 2009
Term of the Day
Proteoglycans: A component of the ground substance of connective tissue. They consist of a protein core, to which negatively charged polysaccharides called glycosaminoglycans (CAGs) are attached. The CAGs form an intertwining network that traps water and forms a substance that varies from a viscous fluid to a semisolid gel. The higher the CAG content, the stiffer the ground substance is. Chondroitin sulfate, keratan sulfate, and hyalouronic acid are three of the most prominent glycosaminoglycans.
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