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Haemoglobin a2

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Haemoglobin a2

(Science: chemical) An adult haemoglobin component normally present in haemolysates from human erythrocytes in concentrations of about 3%. The haemoglobin is composed of two alpha chains and two delta chains. The percentage of hba2 varies in some haematologic disorders, but is about double in beta-thalassaemia.

chemical name: haemoglobin a2