Now, in the final step, this is basically what happens. So we have the final enzyme, E Three, which is known as the Ubiquitin protein ligase, basically enters the picture. And now what it does is it transfers the Ubiquitin group onto this protein target here. So let's suppose this is the target protein that we actually want to break down into its constituent amino acids. And let's suppose this is the residue of the lysine amino acid that we're about to add that ubiquitous molecule to. So ultimately, this carbon here forms a bond with this nitrogen and we form this final product molecule.