ED50 < 1 ng/mL, measure by the dose-dependant proliferation of BALB/3T3 cells, corresponding to a Specific Activity of 1 x 106Units/mg.
Storage Buffer:
Lyophilized from a solution containing 5mM Na2PO4, pH7.5, 50mM NaCl. Reconstitute the lyophilized powder in ddH2O to 101 ug/mL.
Storage Instruction:
Lyophilized protein 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 it is recommended to add a carrier protein (0.1% HSA or BSA). Avoid repeated freeze/thaw cycles.