Polypeptide chains that contribute to a protein's quaternary structure each have their own primary,secondary,and tertiary structures.

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Each polypeptide chain in a protein has its own unique sequence of amino acids (primary structure), which then folds into a particular shape (secondary and tertiary structure) before coming together with other polypeptide chains to form the final quaternary structure.

Polypeptide Chains That Contribute to a Protein's Quaternary Structure Each