And it doesn't matter which carbon atom it is, as long as it's a chiral carbon atom, it's stereogenic. So, to see what we mean, let's compare D glucose and Dmannose. Again, these are both D. And what that means is these two green hydroxyl groups found on a final stereogenic carbon will both point to the right side of the board. Now, let's basically describe all the stereogenic carbons found on each one of these molecules. Let's use a color that let's use orange. So this is a stereogenic carbon, this is a stereogenic carbon.