So these are the amino acids that essentially contain electric dipole. nomins, they contain a certain polar nature. And because of their polar nature, they will be found on the outside of that protein structure interacting with the polar water solvent molecules. So we have Celine, we have three Anine. We have Asparagine glutamine, and we also have cysteine. Now notice that Serene basically contains this hydroxyl group that is attached to our carbon.