A glycoprotein is a membrane bound protein that has a carbohydrate attached to its extracellular surface. The carbohydrate is a oligosaccharide chain that is covalently bonded to the amino acid side chain of the protein. The chain can be of various lengths. Glycoproteins and glycolipids make up a carbohydrate rich region of the plasma membrane called the glycocalyx, and serve to protect the cell .
- ↑ Alberts, B. et al (2008) Molecular Biology of the Cell: 5th Edition, New York: Garland Science