Iroquois-class homeodomain protein IRX-3 (Irx3)

Transcription element. Involved in SHH-dependent neural patterning.

Together with NKX2-2 and NKX6-1 functions to restrict the generation of motor neurons into the appropriate region of the neural tube. Belongs to the class I proteins of neuronal progenitor variables, which can be repressed by SHH signals.