So we see in pure water, we have plenty of water molecules present that can interact with the charge and hydrophilic sections, hydrophilic amino acids of that protein. Now, what we want to basically ask right now is what happens when we add salt into our pure water solution that contains dissolved protein molecules? So we can add, for example, sodium chloride. We can add another type of salt, for example, ammonium sulfate, as we'll see in just a moment. So as soon as we begin to add our salt, what will begin to happen is the solubility of that protein in the water will begin to decrease. And not only that, if we continue adding more salt, eventually we're going to reach a certain specific concentration of salt.