Fig. 6From: dUTPase: the frequently overlooked enzyme encoded by many retrovirusesPhylogenetic tree of dUTPase sequences from exogenous infective retroviruses. This phylogenetic tree was constructed using amino acid multiple alignments and the neighbor-joining method with ETE-toolkit (http://etetoolkit.org/treeview/), with the sequences shown in Fig. 5. Scale bar represents the p-distance (the observed number of nucleotide differences per site).Back to article page