And so we have a dipole moment that essentially points from this positive end to this negative end. And so this will be a relatively polar side chain, but it is still uncharged. And that's why we label this as uncharged polar side chain. So this polar side chain will basically be able to interact with the water molecules found in our solvent and that will basically determine or help determine the structure of our protein. Now, we also have threeanine. And the major difference between thyrene and Serene is that this carbon contains, instead of one of the age groups, it contains a methyl group.