Molecular Weight：Approximately 18.6 kDa, a single non-glycosylated polypeptide chain containing 160 amino acids.
Synonyms：CSIF
Accession：P22301
Biological Activity：Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using murine MC/9-2 cells is less than 1 ng/ml, corresponding to a specific activity of > 1.0 × 106 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.
