And if prothrombin can't stop bleeding, then what that means is we're going to get a condition known as hemorrhage. Now, what happens is in some cases if, for example, our glutamate amino acid in prothrombin cannot be modified by this process of carboxylation, the addition of this carboxyl group, then our prothrombin will essentially not be as active, it will not be able to carry out its function correctly. And that can lead to the condition we call hemorrhage. Now, let's move on to addition of sugar group. So many, many proteins inside our body are modified by adding carbohydrate components. For example, the proteins that are destined to be in a cell membrane or outside the cell, they're modified in this way.