Answer:
Each antibody molecule is essentially identical to the antigen receptor of the B cell that produced it. The basic structure of these proteins consists of two pairs of polypeptide chains (lengths of amino acids linked by peptide bonds) that form a flexible Y shape.(PP 12) Proteins function as enzymes (which catalyze reactions), structural elements, transport molecules, antibodies, etc. The major function of amino acids is to act as the building blocks of proteins.
