And so proteins, membrane proteins such as Rhodopsin can actually move at a relatively high rate, which is about the rate of half this quantity. Here, on the other hand, other proteins, because their functionality depends that they basically remain in that single position. In these cases, proteins are relatively mobile. And one example is fibronectin. So Fibronectin is basically a peripheral glycoprotein that is actually attached onto a transmembrane protein known as Integrin, or Integrin. Now, fibronistin is not only anchored onto the Integrin, but the fibronectin is actually itself anchored onto the collagen fibers found in the extracellular matrix.