Hemoglobin A1

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** A tetrameric complex of 2 molecules of hemoglobin subunit alpha (encoded by either the HBA1 or HBA2 gene) and 2 molecules of hemoglobin subunit beta (encoded by the HBB gene).

**Synonyms:** - Adult Hemoglobin - Hb A - Hb A1 - Hb A1 - Hb a2b2 - HbA - Hemoglobin A - Hemoglobin Alpha2Beta2 - Hgb A1