TFRC and thalassemia: On the other hand, five common β-globin mutations among Chinese (90%) in Malaysia are CD 41/42 (-TCTT), IVS2-654 (C→T) (β + thalassemia phenotype), -28(A→G) (β + thalassemia phenotype), CD 17 (A→T), and CD71/72 (+A) [8].