And so in our mixture, when we run our mixture proteins along that column of that affinity chromatography setup, only the protein that we want to study will bind to our beads inside that column, the other proteins will essentially go down because enzymes only bind to specific types of proteins. And so that's why this is such a high value, because usually affinity chromatography separates by a very, very large margin. Now, what about the purification level? So this divided by this gives us 3500. And what that means is, after all the procedures that we conducted, the final extracted mixture is 3500 times as pure as that initial sample, and that is a high amount. Now, for this set of procedures to actually be good, this yield has to be a high enough yield.