Domain structure and phylogenetic tree of BTB1 and BTB2 proteins of M. occidentalis and their closest homologs from selected species.

(A) Schematic structures of BTB proteins from the chelicerates M. occidentalis, T. urticae (Tu), I. scapularis (Is) and S. mimosarum (Sm), the insects D. melanogaster (Dm), Nasonia vitripennis (Nv) and A. aegypti (Aa), and the mammal H. sapiens (Hs). Names and pfam IDs of conserved domains are shown in brackets. (B) A phylogenetic analysis of BTB proteins from selected species. The tree was generated using a maximum likelihood approach [49] with bootstrap support values shown at the nodes. The tree was rooted using BTB18 of the mammal H. sapiens (Hs_BTB18). The scale bar represents the numbers of substitutions per site.