Biological Activity:Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using murine FDC-P1 cells is less than 0.05 ng/ml, corresponding to a specific activity of > 2.0 × 107 IU/mg.
Purity:> 98 % by SDS-PAGE and HPLC analyses.
Formulation:Lyophilized from a 0.2 μm filtered solution in PBS, pH 7.4.