GRG4 is an alias for the gene, Transducin like enhancer of split 4, in humans. Other names include: Transducin-like enhancer protein 4; Groucho-related protein 4; Grg-4; BCE-1; BCE1; E(spI); ESG4; transducin-like enhancer of split 4. The encoded protein has an amino acid length of 773 and a mass of 83.8 kDa. Other isoforms may exist. GRG4 is a member of the WD repeat Groucho/TLE family. This gene shares homology with other species, including: Mouse, Rat, Frog, Chicken.