產品簡介SpeciesHumanProtein ConstructionExpressed with an N-terminal Met.SCF (Glu26-Ala189)Accession # P21583-1Purity> 95% as analyzed by SDS-PAGEEndotoxin Level< 1 EU/μg of protein by gel clotting methodBiological ActivityThe ED50, as determined by the dose-dependent stimulation of human TF-1 cells, is < 2.0 ng/ml, corresponding to a specific activity of 5 × 105 U/mg.Expression SystemP. pastorisApparent Molecular Weight~20 kDa, on SDS-PAGE under reducing conditions.FormulationLyophilized after extensive dialysis against 10 mM acetic acid.ReconstitutionIt is recommended that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute the lyophilized powder in ddH?O up to 100 μg/ml.Storage & StabilityUpon receiving, this product remains stable for 6 months at lower than -70°C. Upon reconstitution, the product should be stable for 1 week at 4°C or for 3 months at -20°C. For long term storage it is recommended that a carrier protein (example 0.1% BSA) be added. Avoid repeated freeze-thaw cycles.