A slow moving hemoglobin with the same mobility as hemoglobin A2 was found in the red cells of a patient with severe anemia by cellulose actate electrophoresis. The structural analysis of this abnormal hemoglobin showed to be hemoglobin E (α2β226Glu-Lys) Taking into consideration of the clinical symptoms and blood cytology findings, the patient carried a double heterozygote of both 'hemoglobin E and Thalassemia gene. The patient's father also contained the same abnormal hemoglobin,being a heterozygote of he...