Function: Putative transcription factor. May be implicated in specification and differentiation of neuronal cell lineages in the brain. May participate in kidney development and may be involved in podocyte differentiation. similarity: Contains 1 basic helix-loop-helix (bHLH) domain. subunit: Efficient DNA binding requires dimerization with another bHLH protein. tissue specificity: Expressed in lung, liver, kidney, heart and pancreas. Expressed in endothel of umbilical vessels.