4. As we discussed in class, proteins possess a multitude of intramolecular non-covalent interactions that are important to stabilizing their 3D structure. In addition, proteins interact with other proteins in similar ways called Protein-Protein Interactions. The area where the proteins interact is call the interface and is shown below (colored yellow). Based on your understanding of the structure of proteins and non-covalent interactions, answer the following questions. [10 pts.] a. What types of non-covalent interactions would you expect to be present at the interface where the proteins come into close physical contact? Explain your logic. b. Based on your answer in part a, provide examples of 4 amino acids likely to be present at the interface