Glycosaminoglycans are mainly involved in:
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Correct answer: Structural support and lubrication
Glycosaminoglycans (GAGs) are long, unbranched polysaccharide chains that attract water and form viscous gels, providing structural support and lubrication in connective tissues. Major examples include hyaluronic acid (joint fluid lubricant), chondroitin sulfate (cartilage), and heparin (anticoagulant).
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