So this is what we see in this diagram. So to see what we mean, let's begin with this diagram, which is basically this diagram here. And notice I've omitted the ATP molecules in the alpha subunits because the alpha subunits don't participate in this catalysis reaction, only the beta units do. And so in this particular conformation, this particular beta subunit exists in the 10th state. This exists in the lose state and this exists in the open state. Now, only in the 10th state are the ATP and orthophosphate molecules brought close enough for them to actually react and form the ATP.