HST electrophoresis characteristics according to the number of mutant genes (n=14) Hemoglobin according 3 genes HbH 11, 4±5, 5 HbA1 83, 9±14, 8 HbA2 1, 7±0, 3 15 Comments: Among 27 α-Thalassaemia patients, 14 patients had the damage of 3 genes, showed the decrease of HbA2, and all had HbH.