Assays & Kits

Cell signaling through the PD-1 receptor upon binding the PD-L2 ligand attenuates immune responses and is exploited by both tumors and viruses. The PD- 1[Biotinylated]:PD-L2 Inhibitor Screening Colorimetric Assay Kit is designed for screening inhibitors of PD-1 receptor binding to PD-L2 ligand. The key to this kit is the high affinity of biotin-labeled PD-1 for streptavidin-HRP. Only a few simple steps on a microtiter plate are required for the assay. First, PD-L2 is coated on a 96-well plate. Next, PD-1 is incubated with PD-L2 on the plate. Finally, the plate is treated with streptavidin-HRP followed by addition of a colorimetric HRP substrate substrate to produce color, which can then be measured using a UV/Vis spectrophotometer microplate reader.

The Keap1:Nrf2 Inhibitor Screening Assay Kit is designed for identification of inhibitors of Keap1:Nrf2 binding using fluorescence polarization. Using this kit, only one simple step on a microtiter plate is required for Keap1:Nrf2 inhibitor screening reactions. The Keap1 protein and fluorescently labeled Nrf2 peptide are incubated with a sample containing testing inhibitors for 30 minutes. The change in fluorescent polarization can then be measured using a fluorescence reader.

The IDO1 Inhibitor Screening Assay Kit is designed to measure IDO1 enzyme inhibition. The IDO1 Inhibitor Screening Assay Kit is simple to use. Inhibitor and enzyme are added to a sample containing L-Trp substrate. After a room temperature incubation, activity is determined by measuring the absorption of reaction product at λ=321 nm.

The IDO2 Inhibitor Screening Assay Kit is designed to measure IDO2 enzyme inhibition. The IDO2 Inhibitor Screening Assay Kit is simple to use. Inhibitor and enzyme are added to a sample containing L-Trp substrate.

The CTLA4[Biotinylated]:B7-2 Inhibitor Screening Assay Kit is designed for screening and profiling inhibitors of CTLA4:B7-2 interaction. The key to this kit is the high sensitivity of detection of biotin-labeled CTLA4 by streptavidin-HRP. Only a few simple steps on a microtiter plate are required for the assay. First, B7-2 is coated on a 96-well plate. Next, CTLA4-biotin is incubated with B7-2 on the plate. Finally, the plate is treated with streptavidin-HRP followed by addition of an HRP substrate to produce chemiluminescence, which can then be measured using a chemiluminescence reader.

The CD137:CD137L Inhibitor Screening Assay Kit is designed for screening and profiling inhibitors of CD137:CD137L interaction. The key to this kit is the high sensitivity of detection of biotin-labeled CD137 by streptavidin-HRP. Only a few simple steps on a microtiter plate are required for the assay. First, CD137L is coated on a 96-well plate. Next, CD137-biotin is incubated with CD137L on the plate. Finally, the plate is treated with streptavidin-HRP followed by addition of an HRP substrate to produce chemiluminescence, which can then be measured using a chemiluminescence reader.

The PD-L1:B7-1[Biotinylated] Inhibitor Screening Assay Kit is designed for screening and profiling inhibitors of the PD-L1:B7-1 interaction. The key to this kit is the high sensitivity of detection of biotin-labeled B7-1 by streptavidin-HRP. Only a few simple steps on a microtiter plate are required for the assay. First, PD-L1 is coated on a 96-well plate. Next, B7-1-biotin is incubated with PD-L1 on the plate. Finally, the plate is treated with streptavidin-HRP followed by addition of an HRP substrate to produce chemiluminescence, which can then be measured using a chemiluminescence reader.

The Mouse PD-1[Biotinylated]:PD-L1 Inhibitor Screening Assay Kit is designed for screening and profiling inhibitors of this signaling. The key to this kit is the high sensitivity of detection of biotin-labeled PD-1 by streptavidin-HRP. Only a few simple steps on a microtiter plate are required for the assay. First, mouse PD-L1 is coated on a 96-well plate. Next, mouse PD-1 is incubated with mouse PD-L1 on the plate. Finally, the plate is treated with streptavidin-HRP followed by addition of an HRP substrate to produce chemiluminescence, which can then be measured using a chemiluminescence reader.

The PD-1[Biotinylated]:PD-L1 Homogeneous Assay Kit is designed to measure the inhibition of PD-1 binding to PD-L1. The PD-1[Biotinylated]:PD-L1 Homogeneous Assay Kit comes in a convenient AlphaLISA® format with purified biotinylated PD-1, FLAG-tagged PD-L1, and assay buffer to perform a total of 384 reactions. With this kit, only three simple steps on a microtiter plate are required. First, a sample containing biotinylated PD-1 and an inhibitor of choice is incubated with the FLAG-tagged PD-L1 for 60 minutes. Next, acceptor beads are added, then donor beads, followed by reading the Alpha-counts.