So if we take this structure and flip it this way, we're going to see this on top. And the other trimer is basically found on the bottom. So we have a total of two catalytic primers and three of these dimers on the sides. So we have this triangular form as shown in this diagram. Now, the question is, what exactly is the interaction like between regulatory dimers and these catalytic triumphs? Well, it turns out that each one of the regulatory chains in each one of these dimers interacts with one of these catalytic chains in each one of these catalytic trimmers.