It really depends on the type of protein that we're discussing. Now, all the different types of proteins inside our body can usually be categorized into two categories. So we have a type of protein known as a fibrous protein also called structural proteins and we also have globular protein. So let's begin by focusing on fibrous protein. So what is a fibrous protein? Well, a fibrous protein or a structural protein basically consists of these long fibers that play a structural role in the cell and in our body.