Globin chain

This usually refers to one of the peptide chains that comprise the hemoglobin molecule. There are multiple types of globin chains with various combinations that comprise different hemoglobin molecules. These include the alpha, beta, gamma and delta chains. Combination of these globin chains gives rise to multiple types of normal hemoglobin molecules. In order of most to least prevalent Hemoglobins, Hemoglobin A (HbA) is comprised of 2 Alphas + 2 Beta chains, Hemoglobin A2 (HbA2) is comprised of 2 Alphas + 2 Delta chains, and Hemoglobin F (HbF) is comprised of 2 Alphas + 2 Gamma chains.