Table 5  Distribution of the Ggamma -158 C→T and AgammaT mutations in thalassemic patients and in control subjects.
GROUP OF PATIENTS   Allele frequencies
Ggamma-158 C→T   AgammaT
Sub-silent beta tal int  8.6  27.3
Evident beta tal int  18.3  26.6
beta tal int with genotype triplicated alpha + beta tal  16.6  17.6
Hb H disease  37.5  5.5
Tal major  2.1  35.4
Normal controls  25.0  18.0