We have these fibrinogens shown in green and the serum albumin shown in purple, that are basically existing as individual entities. But as we begin to add that salt, and as we add 0.8 molar of ammonium sulfate, the green fibrinogen begins to aggregate because that stabilizes that structure. And so this begins to precipitate and crystallize. But what happens to this one? Well, nothing, because it requires 2.4 molar to actually precipitate. And so while this one will crystallize, the albumin will not crystallize.