Fibroblast Growth Factors-20 (FGF-20) is a 23.5 kDa member of the fibroblast Growth Factors with 211 amino acid residues. FGF-20 is mainly expressed from microglial cells. FGF-20 can regulate central nervous development and function, regulate the survival of dopaminergic neurons via FGF/FGFR-dependent signaling pathway.