Phylogenetic relationship between coelacanth CoeERV1-1 and reptile retroviruses.

Vertebrate retrovirus phylogeny was reconstructed on an alignment of RT (210 amino acids) using Maximum Likelihood with optimized parameters (best of NNI and SPR; optimized invariable sites [37]. Branch values represent supporting aLRT non-parametric statistics. The dashed line highlights the group of Epsilon viruses containing turtle, crocodile, coelacanth and lungfish sequences. Gypsy LTR retrotransposon sequences were used as an outgroup.