And that's exactly why these are slightly less hydrophobic and slightly more reactive than the phenyl Alameine because of the presence of these relatively electronegative atoms. But because we have these relatively large ring structures, these are still hydrophobic, they're still relatively non reactive as compared to these other amino acids, as we'll see in just a moment. So these are our eight hydrophobic side chains. And what that means is because we have these non polar side chain groups, these non polar side chain groups tend to pack together and aggregate. And so in the protein, these are the side chains that will point into that protein structure because they will not want to interact with the polar water molecules that are usually found in solution that are usually found in or outside that protein. So remember, inside the cells of our body and inside our body in general, our solutions are made predominantly of polar water molecules.