Transcription factor that acts as a transcriptional activator (By similarity). May function as a switch in neuronal development (PubMed:7748786). Low level expression is seen in undifferentiated proliferating cells of the neural epithelium. Greater expression is seen in the maturing neurons after they leave the neural epithelium. Also expressed in the embryonic gut epithelium and adrenal medulla. Expression is maximal at stages 24-31, then begins to decline. Expression is low by stage 37 and disappears by stage 39. Does not appear to be expressed in adults.