Biological Activity:Fully biologically active when compared to standard. The ED50 as determined by inducing IL-6 secretion of murine NIH/3T3 cells is less than 7.5 ng/ml, corresponding to a specific activity of > 1.3 × 105 IU/mg.
Purity:> 95 % by SDS-PAGE and HPLC analyses.
Formulation:Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.4.