Activity : 1. Measured in a cell proliferation assay using CTLL2. The ED50 for this effect is typically 0.5-4 ng/mL. The specific activity of recombinant human IL-2 is approximately 2¡Ñ10E4 IU/£gg.
2. Using the Octet RED System, the affinity constant (Kd) of IL2 Protein, Human, Recombinant (Cat. GMP-11848-HNAE) bound Anti-IL2 Antibody (Cat. 11848-MM03) was 0.1 nM.