– Delta-like protein 3 (DLL3) is a transmembrane protein that belongs to the Delta/Serrate/Lag-2 (DSL) family of Notch ligands. DLL3 inhibits primary neurogenesis. May be required to divert neurons along a specific differentiation pathway. Plays a role in the formation of somite boundaries during segmentation of the paraxial mesoderm (By similarity). DLL3 Protein, Human, Recombinant (His & Flag) is expressed in HEK293 mammalian cells with N-His-Flag tag. The predicted molecular weight is 22.30 kDa and the accession number is Q9NYJ7-1.