Rabbit Anti-Human Hemoglobin monoclonal antibody for IHC-P, WB, FC. Hemoglobin A, A2, and F are the three major forms of hemoglobin in human. Hemoglobin is a heterotetramer of two alpha chains and two beta chains in adult hemoglobin A (HbA) ; two alpha chains and two delta chains in adult hemoglobin A2 (HbA2) ; two alpha chains and two gamma chains in fetal hemoglobin F (HbF) . Antibody against hemoglobin alpha chain can recognize all three forms of hemoglobins (A, A2, and F) . Hemoglobin can be used as an erythroid marker for the detection of immature, dysplastic, and megaloblastic erythroid cells in various hemopoietic disorders and hemoglobinopathies.