Additional file 7: of Ancient coexistence of norepinephrine, tyramine, and octopamine signaling in bilaterians BauknechtPhilipp JékelyGáspár 2017 Maximum likelihood tree of octopamine-α receptors. Bootstrap support values are shown for selected nodes. This tree is part of a larger tree containing all investigated GPCRs. The identifiers of deorphanized octopamine receptors were tagged with _Oa. (PDF 16730 kb)