And why do our polypeptides need to create these beta turns in the first place? Well, if we examine the three dimensional structure of polypeptides will see that the structure is very, very compact. And the compactness of that polypeptide is because the polypeptide is able to make many sharp turns as it conforms into that three dimensional structure. And this ability to form these turns is known as beta turning. And these turns themselves are known as beta turns or reverse turns. So the compact nature of proteins is in part due to the polypeptide's ability to make these sudden turns known as the beta turns.