So we have an ionizable fatty acid which means we have this hydrocarbon backbone shown in red that is not polar, so it's hydrophobic. And we have this polar section which is basically the carboxylic acid. And the ionized version of this fatty acid means this carboxylic acid is the protein. So it contains a full charge. Now, because this contains a charge, it can interact via hydrogen bonds with these nearby water molecules and these bonds are shown in purple. Now, these interactions between the polar water and this polar head of the ionized fatty acid, those interactions are good, they are energetically stabilized, they are energetically favorable.