The IL-2: IL-2 Receptor Alpha (IL-2RA) Inhibitor Screening Colorimetric Assay Kit is designed for the screening and profiling of inhibitors or neutralizing antibodies blocking the interaction between human IL-2 and its receptor IL-2RA.

The assay requires only a few steps. First, IL-2RA is coated on a 96-well plate overnight. After blocking, the receptor is pre-incubated with the test inhibitor or neutralizing antibody. Upon subsequent incubation with Biotin-IL-2, the plate is treated with Streptavidin-HRP followed by addition of a colorimetric HRP substrate to produce color, which can be quenched and measured using a UV/Vis microplate reader.