Pathology General 1a1532be The polypeptide chains of hemoglobin A are composed of A 1 alpha, 3 beta B 2 alpha C 2 alpha, 2 beta D 1 alpha, 2 beta, 1 delta High-Yield Explanation Hemoglobin A has 2 alpha and 2 beta chains. HbA2 has two alpha and two delta chains.