Purity of recombinant human FGF-4 was determined by SDS- polyacrylamide gel electrophoresis. The protein was resolved in an SDS- polyacrylamide gel in reducing and non-reducing conditions and stained using Coomassie blue.
The activity was determined by the dose-dependent stimulation of the proliferation of the Balb/3T3 cell line using the Promega CellTiter96® Aqueous Non-Radioactive Cell Proliferation Assay.
Recombinant human FGF-4 (HZ-1218) stimulates dose-dependent proliferation of the NIH/3T3 mouse fibroblast cell line. Viable cell number was quantitatively assessed by Prestoblue Cell Viability Reagent. NIH/3T3 cells were serum starved with 0.02% FBS during treatment with increasing concentrations of recombinant human FGF-4 for 72hrs in defined medium. The EC50 was determined using a 4- parameter non-linear regression model. The EC50 values range from 6-30ng/mL.