So once we phosphorylate this section, what happens is an important protein, basically known as GRB Two, actually binds onto a phosphoryl group. So a phosphorylated tyrosine residue found on this section here. So this serves as an attachment point for this GRB Two, where by the way, GRB stands for growth Factor Receptor bound Protein Two. And so this one, shown in Brown, binds until this section. And this protein acts as an adaptive protein. So this molecule itself doesn't actually activate anything, but rather what it does is it acts as an anchoring point.