DNA-binding regulatory protein implicated in early development. Involved in neuronal cell fate decision. May act as an octamer-dependent activator of transcription (By similarity). Expressed primarily during the first half of embryogenesis. Initial expression in cellular blastoderm stage, then in ectodermal stripes during germband extension. Broad expression in the neuroectoderm followed by limitation to discrete subsets of CNS cells, and expression in specific PNS neurons and support cells. Belongs to the POU transcription factor family. Class-2 subfamily.