Determination of the ApoE allele distribution in five South American Amerindian tribes revealed absence of the ApoE2 allele, accompanied by high ApoE3 and low ApoE4 allele frequencies for most tribes, a distribution only previously reported for the Inuit Eskimo from Greenland. A determinação da distribuição do alelo ApoE em cinco tribos de índios sulamericanos revelou ausência do alelo ApoE2, acompanhada por freqüência alta do alelo ApoE3 e baixa do alelo ApoE4 na maioria das tribos, uma distribuição previamente relatada apenas para os esquimós Inuit da Groenlândia
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