Enables DNA-binding transcription factor activity, RNA polymerase II-specific; HMG box domain binding activity; and identical protein binding activity. Acts upstream of or within negative regulation of neuron differentiation; negative regulation of transcription by RNA polymerase II; and nervous system development. Located in cytoplasm and nucleus. Is expressed in several structures, including central nervous system; epidermis; future brain; genitourinary system; and retina. Orthologous to human OLIG2 (oligodendrocyte transcription factor 2). [provided by Alliance of Genome Resources, Apr 2022]