Alpha thalassaemia in Saudis.

The alpha-thalassaemias are group of inherited anaemias. Their severity is known to increase with the number of alpha-globin genes deleted. Employing different types of restriction enzymes, we found that alpha-thalassaemia-2 are more common than held previously. On the basis of our results we also anticipate that the haplotype alpha alpha alpha anti3.7/ occurs at a higher frequency.