| Species | Human |
| Protein Construction | | IL-2 (Ala21-Thr153)Accession # P60568 |
|
| Purity | > 95% as analyzed by SDS-PAGE |
| Endotoxin Level | < 1 EU/μg of protein by LAL method |
| Biological Activity | The ED50 as determined by the dose-dependant stimulation of the proliferation of CTLL-2 was found to be < 0.1 ng/ml, corresponding to a specific activity of > 1.0 × 107 IU/mg. |
| Expression System | E. coli |
| Theoretical Molecular Weight | 15.3 kDa |
| N-terminal Sequence Analysis | The sequence of the first five N-terminal amino acids wa determined and found to be Met-Ala-Pro-Thr-Ser-Ser. |
| Apparent Molecular Weight | 15,300 Da |
| Formulation | Lyophilized from a 0.2 μm filtered solution in 10 mM sodium citrate, pH 4.0. |
| Reconstitution | It is recommended that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute the lyophilized powder in sterile 18 MΩ-cm H₂O up to 100 μg/ml. |
| Storage & Stability | Upon receiving, this product remains stable for 6 months at -70°C or -20°C. Upon reconstitution, the product should be stable for 1 week at 4°C or for 3 months at -20°C. Avoid repeated freeze-thaw cycles. |
