Homology and concerted evolution at the α1 and α2 loci of human α-globin

Abstract
The identical structure of 2 racially distinct .alpha.1-globin alleles (from an Asian and a Caucasian) and the high degree of homology between the .alpha.1- and .alpha.2-globin loci indicate that mechanisms exist for suppression of allelic polymorphisms and for exchange of genetic information within the .alpha.-globin gene complex.