Memotiva AP Biology Unit 1 Topic 1.4 and 1.5: Proteins, Amino Acids, Peptide Bonds, and Four Levels of Protein Structure

What is the primary structure of a protein?

AP Biology Unit 1 Topic 1.4 and 1.5: Proteins, Amino Acids, Peptide Bonds, and Four Levels of Protein Structure

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Nortren·April 11, 2026

What is the primary structure of a protein?

0:16

The primary structure is the linear sequence of amino acids in a polypeptide chain, held together by peptide bonds. It is determined by the gene that codes for the protein. Even a single change in the primary structure can dramatically alter the protein's function, as in sickle cell disease.