And what that means is it basically transverses the entire width of that membrane. So this is an example of an integral protein. So is this one, and so is this one. 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.