Molecular Weight：Approximately 12.9 kDa, a single non-glycosylated polypeptide chain containing 114 amino acids.
Accession：P40933
Biological Activity：Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using murine CTLL-2 cells is less than 0.5 ng/ml, corresponding to a specific activity of > 2.0 × 106 IU/mg.
Purity：> 97 % by SDS-PAGE and HPLC analyses.
Formulation：Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.4.
