# Chapter Two: Organic Chemistry

### Primary Structure of Protein: Peptide Bonds

| A peptide bond is a covalent bond that links amino acids together to create proteins. The chains that are produced are called polypeptide chains. A peptide bond forms by the condensation reactions between the acids. Image by Mike Lally .

The primary structure of a protein molecule is the number and sequence of the various amino acids in the polypeptide chain. It is the "recipe." Every kind of protein has a different primary structure. ; |

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