And now we anchor our molecule in place. And so as we continually add our amino acids, as we'll see in just a moment, this growing polypeptide chain will essentially remain anchored onto this solid surface. And so we can easily wash our polypeptide many, many times over. And that polypeptide will not be washed away because it will be physically attached onto that solid surface. Now let's move on to step three. In step three, we basically want to remove the tea bag group before we actually want to add this molecule and form that peptide bond between this amino acid and this amino acid here.