As the normal level of Hb A2 in our laboratory is 2.7±0.3%, the results
shown in Table 1 indicated that all Hb E disorders including heterozygous
Hb E, homozygous Hb E and β-thalassemia/Hb E disease
had elevated Hb A2 levels. The latter two disorders had higher Hb
A2 levels as compared to Hb E heterozygote.