Question: what are glycosaminoglycans and proteoglycans?
Answer: Proteoglycans and Glycosaminoglycans Are Components of Extracellular Matrices and Cell Surfaces. ... GAGs are linear polysaccharides, whose building blocks (disaccharides) consist of an amino sugar (either GlcNAc or GalNAc) and an uronic acid (GlcA and IdoA).