HBZ Rabbit Polyclonal Antibody

Hemoglobin subunit zeta (HBZ) is an α-like globin chain encoded by the human HBZ gene, consisting of 142 amino acids with a molecular weight of approximately 16 kDa, and serves as an important component of the embryonic hemoglobin complexes. During early embryonic development (approximately weeks 3 to 8), it primarily combines with the ε chain to form embryonic hemoglobin Gower-1 (the ζ₂ε₂ tetramer composed of α-like ζ chains and β-like ε chains), and to a lesser extent associates with the γ chain to form embryonic hemoglobin Portland-1 (ζ₂γ₂). Its core physiological function is to provide effective oxygen transport and gas exchange for embryonic tissues during the stage when the embryonic circulatory system is not yet fully developed. As embryonic development proceeds, around 8 to 12 weeks of gestation, HBZ gene expression is gradually shut down, and its function is replaced by the adult α-globin genes (HBA1 and HBA2). In adult individuals, the HBZ gene is normally in a silent state, although under rare circumstances (such as large-scale deletions in the α-globin gene cluster), it may be re-expressed; however, its function and pathological significance in adults have not yet been fully elucidated. In clinical diagnostics, detection of HBZ expression can be used to identify abnormal persistent expression of embryonic hemoglobin, aiding in the diagnosis of certain hereditary hemoglobinopathies (such as α-thalassemia) and assessing fetal developmental status.