Growth factors are a family of proteins capable of stimulating cellular growth, proliferation, and cellular differentiation. They typically act as signaling molecules by binding to receptors on the cell surface. Many growth factors are quite versatile, stimulating cellular division in numerous different cell types, while others are specific to a particular cell-type. Multiple growth factors often participate in cellular functions together. For example, VEGF, FGFb, and EGF stimulate angiogenesis. Therefore, profiling the expression pattern of growth factors provides a valuable insight to the biological mechanisms underlying cellular functions. Signosis' Growth Factor ELISA Strip can quantitatively profile and measure 8 growth factor cytokines.