Figure 5From: Stimulation of Activin A/Nodal signaling is insufficient to induce definitive endoderm formation of cord blood-derived unrestricted somatic stem cellsFibroblast Growth Factor 4 is active. Fold change in NIH 3T3 cell numbers following treatment with Fibroblast Growth Factor 4. A dose-dependent increase in NIH 3T3 cell numbers was observed with an increase in Fibroblast Growth Factor 4 concentration, indicating that the growth factor is active.Back to article page