And somewhere here we have a turn that will take place. And that turn can be a beta turn that we're going to discuss in just a moment. And once that turn takes place, it extends and moves in the opposite direction. And so we have the anti parallel arrangement of our two strands of polypeptide. Now, in this particular case, the only difference is there's still a parallel with respect to one mill, but now they run in the same direction. And what that will do is it will change the type of interaction that exists between our amino acids.