Enables DNA-binding transcription factor activity; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and identical protein binding activity. Contributes to DNA-binding transcription factor activity, RNA polymerase II-specific. Involved in positive regulation of transcription by RNA polymerase II. Located in nucleus. Orthologous to human USF2 (upstream transcription factor 2, c-fos interacting). [provided by Alliance of Genome Resources, Apr 2022]