Now, some proteins can be damaged, for example, the oxidation processes. And when proteins are damaged, we have special types of complexes that exist inside our cells, as we'll talk about in the next lecture, that utilize a protein known as Ubiquitin and a complex known as the proteosome complex that essentially breaks down and degrades damage or misfolded proteins into their amino acid constituents. And then those amino acid constituents can be utilized by the cell to carry out some type of process, to build some type of important molecule. Now, unlike fatty acid molecules or glucose molecules, amino acids are not actually stored inside our body. So if we have excess amino acids, we cannot actually store that excess amino acids in the same way that we can store glucose as glycogen or fatty acids in our fat cells. So what exactly happens to these excess amino acids?