HBAZ_HORSE Hemoglobin subunit zeta Hemoglobin zeta chain MSLTKAERTMVVSIWGKISMQADAVGTEALQRLFSSYPQTKTYFPHFDLHEGSPQLRAHGSKVAAAVGDAVKSIDNVAGALAKLSELHAYILRVDPVNFKFLSHCLLVTLASRLPADFTADAHAAWDKFLSIVSSVLTEKYR 142 HBZ1 Zeta-globin The zeta chain is an alpha-type chain of mammalian embryonic hemoglobin, synthesized primarily in the yolk sac.