Abstract Tunicates are evolutionary model organisms bridging the gap between vertebrates and invertebrates. A genomic sequence in Ciona intestinalis (CiOX) shows high similarity to vertebrate orexin receptors and protostome allatotropin receptors (ATR). Here. molecular phylogeny suggested that CiOX is divergent from ATRs and human orexin receptors (hOX1/2). https://vacuumdoctores.shop/product-category/obsolete-parts-with-alternative-or-secondhand-available/