Transcription factor that binds preferentially to a variant of the octamer motif (5'-ATGATAAT-3'). In the embryo, widely expressed, with highest levels in the developing brain and spinal cord. In the adult, mostly found in the brain, where it is diffusely expressed with the exception of an enrichment in layer IV of the neocortex. Also found in kidney, lung, heart, adrenal, skin, and placenta. Low levels in spleen, muscle, liver, anterior pituitary, testis and ovary. Contains two direct repeats of 7 amino acids in the N-terminus. Belongs to the POU transcription factor family. Class-6 subfamily.