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The minimum spanning tree of 18 Alu subfamilies. The tree is based on an Alucode analysis of 2128 Alu repeats extracted from primate BES data. (Blue) Eleven families were shared among human and at least one nonhuman primate species while seven were lineage specific: (black) baboon–macaque; (green) marmoset; (red) lemur. The number of Alu elements (in parentheses) and the P-value within each group are indicated.
