And that means if all those active sites are occupied at some given moment in time, six of these reactions are taking place at the same exact moment in time. So this is where poly so this is let's suppose the poly molecule, it binds onto this location, the first active side, this location, the second active side, and the third active side as well. And of course, if we flip it this way, we're going to see the other catalytic trimmer and it also contains three of these active sites. Now, the final question I'd like to explore is what did scientists actually see when that polymer molecule was bound onto the active side? What types of structural changes actually took place in the queen every structure of this atcase allosteric enzyme? Well, just like as we discussed in hemoglobin, when the oxygen molecules are not bound to the heme groups of hemoglobin, that hemoglobin molecule exists in the T state, in the ten state.