A Study of African H‐Deficient A2 and A2B Phenotypes

The high proportion of non‐A1 in the African population has once again been confirmed and has been found to be 40.3%. The H content in African group A shows the same variation as in Caucasians. The strong action of B gene when in pair with A is more pronounced in Africans than in Caucasians. H and A are often absent or decreased on cells of AB blood groups in Africans when estimated by Dolichos biflorus high titre anti‐A1 and Ulex europaeus high titre anti‐H.