| Ascidian Gene | Ascidian Expression | Vertebrate Gene | Vertebrate Expression |
|---|---|---|---|
| Hroth | Sensory Vesicle/Anterior Cerebral Vesicle | Otx-1/Otx-2 | Forebrain/Midbrain |
| HrPax-258 | Neck Region/Primordial Pharynx and Atrial Primordia | Pax-2/Pax-5/Pax-8 | Midbrain/Anterior Hindbrain |
| HrHox-1 | Visceral Ganglion | Hox-1 | Posterior Hindbrain/Spinal |