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Presence of the Copia LTR-retrotransposon in different snake lineages. Phylogenetic tree incorporating the interrogated snake genomes. The branch lengths correspond to estimated divergence in MYA [ 49 ]. The numbers on the right correspond to the number of the Copia LTR-retrotransposon copies found in each genome. Depending on the continuity of the genomes, some copies might have been missed. The corn snake is highlighted in bold and the common species names are given in parenthesis. The tree was built using TimeTree v. 5 [ 49 ]

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