In this particular case. In this case, it is a transmembrane protein because it spans the entire width. But in this case, it's not a transmembrane, but it's still an itchy protein because it interacts extensively via hydrophobic interactions with a hydrophobic core of that membrane. So the portion of the protein within the core interacts via Vanderbilt forces we call London dispersion forces with the hydrocarbon tails of the phospholipids, these red structures shown in that diagram. Now, peripheral proteins, on the other hand, interact with the membrane less extensively. They don't have as much of that hydrophobic section to basically be able to interact in the same stabilizing way.