Hemoglobin A2 (HbA2) is a minor component of adult hemoglobin, accounting for approximately 2-3% of total hemoglobin. It is composed of two alpha and two delta globin chains (α2δ2), which differ from the more common hemoglobin A1 (HbA1), which consists of two alpha and two beta globin chains (α2β2). HbA2 plays a crucial role in the diagnosis and monitoring of certain hemoglobinopathies, such as beta-thalassemia and sickle cell anemia, as its levels can be elevated in these conditions. The measurement of HbA2 is typically done through hemoglobin electrophoresis or high-performance liquid chromatography (HPLC) and serves as an essential diagnostic tool in the field of hematology.
The CAS Registry Mumber 9034-52-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,3 and 4 respectively; the second part has 2 digits, 5 and 2 respectively. Calculate Digit Verification of CAS Registry Number 9034-52: (6*9)+(5*0)+(4*3)+(3*4)+(2*5)+(1*2)=90 90 % 10 = 0 So 9034-52-0 is a valid CAS Registry Number.