Now, the product molecule of step five is succinate. And notice that even though we had all these color coded atoms in these steps here, we don't have the color coded atoms in this step. And that's because now this molecule is symmetric. Look, we have both of these ends contain the c O negatively charged group, and then we have the methylene group in between. And so this is a completely symmetrical molecule. And that's why we no longer actually use these color coded atoms.