Now, although most mucins are actually produced by the cells and released into the extracellular matrix, some of these mucins actually remain attached onto the cell membrane. And this is what is shown in this diagram. So we have the cell membrane, we have this hydrophobic section of the protein Children Brown and this is the rest of that protein. And these are basically the ligosaccharides. And we have many of these oligosaccharides as shown. So what exactly is a function of mucins?