Measured in a cell proliferation assay using CTLL-2 mouse cytotoxic T cells. The ED50 for this effect is 0.2~0.3 ng/mL. The specific activity of recombinant human IL-2 is >1.00 x 10 7 IU/mg, which is calibrated against the human IL-2 WHO International Standard (NIBSC code: 86/500).
Supplier Page from OriGene Technologies for IL2 (NM_000586) Human Recombinant Protein