Enables E-box binding activity and protein heterodimerization activity. Involved in positive regulation of neuron differentiation. Acts upstream of or within positive regulation of gene expression and positive regulation of transcription, DNA-templated. Part of transcription regulator complex. Is expressed in several structures, including alimentary system; branchial arch; central nervous system; genitourinary system; and sensory organ. Human ortholog(s) of this gene implicated in craniosynostosis. Orthologous to human TCF12 (transcription factor 12). [provided by Alliance of Genome Resources, Apr 2022]