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 blood vessel maturation; hemopoiesis; and regulation of transcription, DNA-templated. Predicted to be located in nucleus. Human ortholog(s) of this gene implicated in T-cell acute lymphoblastic leukemia. Orthologous to human LYL1 (LYL1 basic helix-loop-helix family member). [provided by Alliance of Genome Resources, Apr 2022]