Biological Activity:Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using murine D10S cells is less than 2 pg/ml, corresponding to a specific activity of > 5.0 × 108 IU/mg.
Purity:> 96 % by SDS-PAGE and HPLC analyses.
Formulation:Lyophilized from a 0.2 µm filtered solution in PBS, pH 7.4, with 5 % trehalose, 0.02 % Tween-20.