Fig. 9

Phylogenetic and structural analysis of He-unpg. a Analysis of the ANTP Class genes based on an alignment of the homeodomain. Maximum likelihood tree topology is shown. The full ANTP Class phylogeny is shown in Additional file 7: Fig. S3. Bootstrap support values (out of 500 replicates) are shown above select branches. Posterior probabilities are shown below select branches. He-unpg is colored purple. b Structure of He-unpg gene. Relative to the coding strand, 5′ is to the left. Thick lines represent exons. Thin lines represent introns. Black exons represent UTR. Purple exons represent sequences that code for the homeodomain. Gray exons represent other protein coding sequences. c Structure of He-UNPG protein. b, c Numbers represent nucleotide or amino acid positions (see Additional file 1: Table S1). Dm, Drosophila melanogaster; He, Hypsibius exemplaris; Hs, Homo sapiens