But the peripheral proteins can easily be removed by, for example, changing the PH or adding some type of salt solution, because what that does is it disrupts those ionic or hydrogen bonds that exist between the peripheral proteins and that cell membrane, as we'll see in just a moment. So we see that integral proteins bond to the membrane extensively via extensive hydrophobic regions. And we even have integral proteins that span the entire width of that bilayer membrane. 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.