Frequencies of the Diego blood types:
Di(a-b+) is found in more than 99.9% of Europeans and Africans and >90% of Asians.
Di(a+b+) found in less than 0.1% of Europeans and Africans and in 10% of Asians.
Di(a+b-) found in less than 0.01% of Europeans, Africans, and Asians.
Olivès et al. (1995) . “Kidd blood group and urea transport function of human erythrocytes are carried by the same protein.” J Biol Chem 270(26):15607-10.
Olivès et al. (1997) . “The molecular basis of the Kidd blood group polymorphism and its lack of association with type 1 diabetes susceptibility.” Hum Mol Genet 6(7):1017-20.