From: An Aγ-globin G->A gene polymorphism associated with β039 thalassemia globin gene and high fetal hemoglobin production
(G->A) mutation Aγ-globin gene
XmnI polymorphism Gγ-globin gene
G/G
A/G
A/A
55
0
−/−
16
+/−
4
+/+