H, A and A1Reactivity in Two Polynesian Groups

Abstract
Polynesian O bloods from Samoans and Tokelau Islanders have the same mean H reactivity as Caucasians, and their A1 blood has the same A1 content. Polynesian A1 bloods have significantly greater H reactivity than Caucasian, and the Tokelau Islanders also showed enhanced A and IT. The Polynesian AHI molecular conformation probably differs from the Caucasian pattern, providing an arrangement of antigen sites more favorable to some antigen-antibody reactions.