Figure 2. Maximum likelihood tree of candidate odorant-binding proteins (OBPs) from S. littoralis and other Lepidoptera.

Sequences used were from B. mori [36], H. melpomene [41], H. virescens [56], [57], [58], M. sexta [37], [59] and from three other species of the genus Spodoptera (S. exigua, S. frugiperda and S. litura). Signal peptide sequences were removed from the data set. Branch support was estimated by approximate likelihood-ratio test (aLRT) (circles: >0.95) [70]. Images were created using the iTOL web server [89]. SlitOBPs are in bold and the new SlitOBPs identified in this study are in red.