Peptide Bond Formation | Animation

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During protein synthesis, peptide bonds link amino acids together in the order specified by DNA instructions. In this case, the first two amino acids in the protein are methionine and alanine. Here are ball and stick models of these amino acids. Peptide bonds formation is a type of condensation reaction. During the reaction, the highlighted atoms are removed. The carbon atom in the carboxyl group of the methionine becomes link to the nitrogen atom in the amino group of alanine. A peptide bonds forms between methionine and alanine. Water forms as a by product of the reaction. The next amino acid specified by the DNA is leucine. Again, atoms are removed and a new covalent bond forms. Another molecule of water forms as a byproduct. The next amino acid is tryptophan. Another peptide bonds forms and another molecule of water is released. Noticed that the backbone of a forming polypeptide consists of carbon atoms with nitrogen atoms at regular intervals. The sequence of amino acids in a polypeptide chain is the primary structure of a protein. It is the primary structure that gives rise to a protein's unique properties.