ED50 <0.2 ng/mL, measured by dose-dependent proliferation of mouse BALB/c 3T3 cells, corresponding to a specific activity of 5 x 106?IU/mg.
Storage Buffer:
Lyophilized from a solution containing 1X PBS, pH 7.5. Reconstitute the lyophilized powder in ddH2O to 100 ug/mL.
Storage Instruction:
Stored at room temperature for 3 weeks, should be stored at -20°C. Protein aliquots at 4°C for 2-7 days and should be stored at -20°C to -80°C for long term storage. Avoid repeated freeze/thaw cycles.