Now, the next question is what determines the actual state of that particular subunit? So let's take a look at the following diagram. So what we see happening in the following diagram is as we go, for instance, from this particular structure to this particular structure, the actual alpha three, beta three hexama ring does not rotate. But this middle portion, the gamma structure shown red, actually rotate. So remember, as we discussed previously, it's this gamma structure that actually rotates as a result of the rotation of the C ring. As we'll see the next lecture that causes a change in confirmation of the beta subunit.