Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Predicted to be involved in several processes, including epithelial cilium movement involved in determination of left/right asymmetry; positive regulation of type B pancreatic cell development; and regulation of transcription, DNA-templated. Predicted to act upstream of or within determination of left/right symmetry. Predicted to be located in chromatin. Predicted to be part of transcription regulator complex. Orthologous to human RFX3 (regulatory factor X3). [provided by Alliance of Genome Resources, Apr 2022]