Anthropological survey on red cell glutathione peroxidase (GPX1) polymorphism in central western Africa: a tentative hypothesis on the interaction between GPX1*2 and Hb beta *S allelic products.

Phenotype and allele frequencies for erythrocyte glutathione peroxidase (GPX1) polymorphism are reported in the Mbugu and Sango (Central African Republic), Goun (Benin), and Bamileke (Cameroon) ethnic groups. The GPX12 allele frequencies (from 0.012 in the Sango to 0.058 in the Bamileke) fit into the range of the data already known for the Subsaharan populations. The value of GPX12 for study of the genetic admixture between Negro and Pygmy populations is suggested. Three different unusual GPX1 electrotypes are described. Finally, we hypothesize an interaction between GPX12 and Hb betaS allelic products occurring in the sickle cells infected by Plasmodium falciparum.