Recombinant human Fibroblast Growth Factor-basic (bFGF) (AA134-288), also called as FGF-2 or HBGF-2, is a bioactive protein intended for use in cell culture applications. bFGF is a heparin-binding member of the FGF superfamily of molecules. It is involved in a number of biological processes including embryonic development, differentiation, survival, regeneration and migration (1-5). In addition, bFGF is a critical factor for growing embryonic stem cells in culture to remain in an undifferentiated state. Recombinant human FGF-basic is a 17.3 kDa protein consisting of 154 amino acid residues.