And these are examples of the Holworth projections. Now let's take a look at another type of sugar molecules. So, remember, we have aldo hexosis, and we also have sugar molecules that contain ketone groups, and these are known as ketosis. So let's take a look at a specific example of a keto hexose, basically a six carbon sugar molecule that contains a ketone group. And the example we're going to look at is defractose. So, in defuctose, we also have 123456 carbon atoms, just like in this particular case.