Additional file 4.

Complete NJ tree of DGR RTs. Protein sequences of DGR RTs were aligned using COBALT and a Neighbor-Joining tree was built with PHYLIP. Bootstrap values >50 are indicated. Phylogenetic groups of organisms that also cluster on RT level are marked. Distances are indicated as expected substitutions per site. A group II intron reverse transcriptase from Bacillus halodurans (GI 47076650) was used as outgroup to root the tree.

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Schillinger et al. BMC Genomics 2012 13:430   doi:10.1186/1471-2164-13-430