So in this diagram, we take this molecule here and we mix it with this amino acid attached onto our solid surface as shown. And we form a peptide bond between this carbon here. So this carbon right over here and this nitrogen right over here. And notice that this oxygen is actually lost and that's because we also form a molecule known as dicyclohexyluria. And so what happens is this entire molecule is essentially broken off to form this stabilized molecule that is resonance stabilized between this nitrogen, this nitrogen and this oxygen. And so this is the first peptide bond that is formed in our polypeptide chain.