A number of ELISA Kits are available that target bHLHb19, an alias of the protein, transcription factor 4. The human protein is encoded by the gene TCF4. The protein's cellular localization is indicated to be nuclear. Additional synonyms or past names for this protein may include: E2-2, FECD3, ITF-2, ITF2, PTHS, SEF-2, SEF2, SEF2-1, SEF2-1A, SEF2-1B, SEF2-1D, TCF-4, bHLHb19. Homology is conserved in other species, such as Mouse, Rat.