And that means the salt concentration at which protein salt out will differ from one protein to another. And so if we have two different proteins in, let's say, an Aqueous solution, and those two different proteins have a big variation in their salt concentration at which they salt out, we can basically purify them and separate them by using the salting out method. So let's see exactly what we mean. So salting out can be used to isolate a protein of interest from a mixture of different proteins. And in our example, we're going to look at a mixture of two proteins. So one of these proteins is a blood clotting protein known as fibrinogen.