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Polypeptide
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polypeptide
a linear chain of amino acids linked by peptide bonds, forming a primary structure of a protein
Example
Insulin is a polypeptide hormone that regulates blood sugar levels.
Hemoglobin, responsible for oxygen transport in blood, is a polypeptide with four subunits.
Amino acids link together through peptide bonds to form the linear structure of a polypeptide.