Enables DNA-binding transcription factor activity; double-stranded DNA binding activity; and sequence-specific DNA binding activity. Involved in several processes, including response to cAMP; response to steroid hormone; and transcription by RNA polymerase II. Located in nucleus. Biomarker of renal carcinoma. Orthologous to human JUNB (JunB proto-oncogene, AP-1 transcription factor subunit). [provided by Alliance of Genome Resources, Apr 2022]