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R&D Systems™ Recombinant Human IL-2 Protein

Version with mutation found in aldesleukin Available!

Supplier:  R&D Systems™ 202IL050/CF

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Catalog No. 202IL050CF

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Measured in a cell proliferation assay using CTLL-2 mouse cytotoxic T cells. Gearing, A.J.H. and C.B. Bird (1987) in Lymphokines and Interferons, A Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 295. The ED50 for this effect is 0.05-0.25 ng/mL. The specific activity of Recombinant Human IL-2 is approximately 9.1 x 106 IU/mg, which is calibrated against recombinant human IL-2 WHO International Standard (NIBSC code: 86/500). Specific activity is for reference purposes only and is not routinely tested.


Lyophilized from a 0.2 µm filtered solution in Acetonitrile and TFA.
M.W. (Observed): 13 kDa, reducing conditions; M.W. (theoretical): 15 kDa
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
E. coli-derived human IL-2 protein Ala21-Thr153, with an N-terminal Met
<0.10 EU / 1 µg of the protein by the LAL method.
Reconstitute at 100 µg/mL in sterile 100 mM Acetic Acid. Alternatively, reconstitute at 100 µg/mL in sterile deionized water and use within 24 hours, store (at 2°C to 8°C.)
50 µg
Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20°C to -70°C as supplied. 1 month, 2°C to 8°C under sterile conditions after reconstitution. 3 months, -20°C to -70°C under sterile conditions after reconstitution.


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