 So, after we've looked at the interior and the head group region, I really want to stress my main love story, that the interface region here. The interior part is super important. That's the reason why I have the entire barrier, but the pure hydrophobic region there also makes it surprisingly boring. Head up here when we have water, yeah, that's fine, but that's going to be like globular proteins. The really fascinating part is the small region here where we can kind of do both. So this is an amphiphatic region, meaning that it can be either polar or hydrophobic. So it's amphiphatic. And that means that almost all these concepts we brought up happen there. We have the anchoring, anchoring, anchoring of aromatic compounds happening there. We have the snorkeling. We have the anti snorkeling. And we have this surface helices. Remember, if the helix itself is amphiphatic, it would have to lie down and then it's going to be present in this region. So this region is frequently the most interesting in proteins because we can go either down or up depending on the amino acid.