glycoproteins are major constituents of the two-component mucous barrier : glycoproteins of the mucin-type rich in carbohydrate groups form the viscoelastic mucous gel of the mucosa , oligosaccharides of glycoproteins and glycosphingolipids embedded into the plasma membrane form the glycocalyx of the epithelial cell surface .
C0007603
plasma membrane
C0061622
glycocalyx