Enables RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Acts upstream of or within several processes, including developmental cell growth; hematopoietic stem cell proliferation; and somatic stem cell division. Located in synapse. Is expressed in several structures, including central nervous system; gonad; limb; sensory organ; and spleen. Orthologous to human FUBP1 (far upstream element binding protein 1). [provided by Alliance of Genome Resources, Apr 2022]