Cell-based Assays

The Fc (IgG1): FcRn Inhibitor Screening Colorimetric Assay Kit is designed for the screening and profiling of neutralizing antibodies or inhibitors of the interaction between human Fc (IgG1) and human FcRn (Neonatal Fc receptor for IgG). This kit comes in a convenient 96-well or 384-well format, with purified Biotinylated-FcRn complex (Fc receptor amino acids 24-297 and B2M amino acids 21-119) and Fc (IgG1) (amino acids 100-330) proteins, Streptavidin-HRP, and assay buffers for 100 or 400 reactions. A 96-well plate is coated with Fc (IgG1) protein. After blocking, the plate is pre-incubated with an inhibitor or neutralizing antibody. Upon subsequent incubation with FcRn-biotin, 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. The signal is proportional to the binding of FcRn to Fc (IgG1).

The WRN Helicase Activity Assay is a fluorogenic assay designed for screening and profiling of WRN (Werner Syndrome ATP-dependent Helicase) antagonists/inhibitors by monitoring their effect on WRN-catalyzed DNA unwinding. WRN Helicase Activity Assay Kit comes in a convenient 384-well format, with contains enough purified recombinant WRN, ATP, DNA substrate, assay buffer and additives for 400 reactions. The DNA probe is conjugated on one strand with the TAMRA (tetramethylrhodamine) fluorophore, and on the other strand with BHQ (Black Hole Quencher) which effectively quenches TAMRA fluorescence due to their proximity within the DNA double strand. WRN unwinding of the DNA probe separates the two strands, releasing TAMRA fluorescence. WRN activity, therefore, results in a proportional increase in fluorescence.

The PDE6C Assay Kit is a fluorescence polarization (FP), homogeneous, 384-well assay kit designed for the screening and profiling of PDE6C (Phosphodiesterase 6C) inhibitors. This assay takes advantage of a specific fluorescent phosphate-binding nanoparticle. The kit contains enough purified recombinant PDE6C, fluorescent probe, PDE assay buffer, Binding Agent, and diluent for 400 reactions. The assay uses a fluorescein-labeled cyclic guanosine monophosphate (cGMP-FAM for PDE6C), in which the phosphate group is engaged within the cyclic nucleotide. This is a very small molecule that rotates fast (low FP). PDE6C catalyzes the hydrolysis of the phosphodiester bond in the cyclic nucleotide and frees the phosphate group. In a second step the free phosphate group is recognized by a specific phosphate-binding nanobead (Binding Agent) leading to the formation of a large complex, with restricted movement (high FP). FP is proportional to PDE6C activity. This assay requires a fluorescent micropl

The FcRn:HSA Binding Chemiluminescent Assay Kit is designed for screening and profiling neutralizing antibodies or blockers of the interaction between Human Serum Albumin (HSA) and human FcRn. This kit comes in a convenient 384-well format, with Biotinylated HSA and FcRn (FCGRT/B2M) (amino acids 24-297 of FCGRT and 21-119 of B2M), Streptavidin-HRP, and assay buffers for 400 reactions. The assay requires only a few steps. First, FcRn is coated on a 384-well plate overnight. After blocking, the protein is pre-incubated with the neutralizing antibody or blocker. Upon subsequent incubation with Biotin-HSA, 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 LIVE-Step™ Cell Assay System is designed for high-throughput, homogeneous, sensitive luminescence quantification of metabolically active, viable mammalian cells. It consists of a single ready-to-use solution to lyse the cells and measure the amount of ATP present in culture in one step. Detection is linear up to >100,000 suspension cells and >50,000 adherent cells with an R² value greater than 0.99. The signal is stable for longer than 5 hours (T_1/2 >300 min) allowing for experimental flexibility. This product is compatible with multiple media formulations and the presence of phenol red, and stable after multiple freeze-thaw cycles.

The LIVE-Step™ Cell Assay System is designed for high-throughput, homogeneous, sensitive luminescence quantification of metabolically active, viable mammalian cells. It consists of a single ready-to-use solution to lyse the cells and measure the amount of ATP present in culture in one step. Detection is linear up to >100,000 suspension cells and >50,000 adherent cells with an R² value greater than 0.99. The signal is stable for longer than 5 hours (T_1/2 >300 min) allowing for experimental flexibility. This product is compatible with multiple media formulations and the presence of phenol red, and stable after multiple freeze-thaw cycles.

The LIVE-Step™ Cell Assay System is designed for high-throughput, homogeneous, sensitive luminescence quantification of metabolically active, viable mammalian cells. It consists of a single ready-to-use solution to lyse the cells and measure the amount of ATP present in culture in one step. Detection is linear up to >100,000 suspension cells and >50,000 adherent cells with an R² value greater than 0.99. The signal is stable for longer than 5 hours (T_1/2 >300 min) allowing for experimental flexibility. This product is compatible with multiple media formulations and the presence of phenol red, and stable after multiple freeze-thaw cycles.

The Fc (IgG1): FcRn Inhibitor Screening Chemiluminescent Assay Kit is designed for the screening and profiling of neutralizing antibodies or inhibitors of the interaction between human Fc (IgG1) and human FcRn (Neonatal Fc receptor for IgG). This kit comes in a convenient 96-well or 384-well format, with purified Biotinylated-FcRn complex (Fc receptor amino acids 24-297 and B2M amino acids 21-119) and Fc (IgG1) (amino acids 100-330) proteins, Streptavidin-HRP, and assay buffers for 100 or 400 reactions. A 96-well plate is coated with Fc (IgG1) protein. After blocking, the plate is pre-incubated with an inhibitor or neutralizing antibody. Upon subsequent incubation with Biotin-FcRn, the plate is treated with Streptavidin-HRP followed by addition of the ELISA ECL substrate to produce chemiluminescence that can be measured using a chemiluminescence reader. The chemiluminescence signal is proportional to the binding of FcRn to Fc (IgG1).

The Fc (IgG1): FcRn Inhibitor Screening Chemiluminescent Assay Kit is designed for the screening and profiling of neutralizing antibodies or inhibitors of the interaction between human Fc (IgG1) and human FcRn (Neonatal Fc receptor for IgG). This kit comes in a convenient 96-well or 384-well format, with purified Biotinylated-FcRn complex (Fc receptor amino acids 24-297 and B2M amino acids 21-119) and Fc (IgG1) (amino acids 100-330) proteins, Streptavidin-HRP, and assay buffers for 100 or 400 reactions. A 96-well plate is coated with Fc (IgG1) protein. After blocking, the plate is pre-incubated with an inhibitor or neutralizing antibody. Upon subsequent incubation with Biotin-FcRn, the plate is treated with Streptavidin-HRP followed by addition of the ELISA ECL substrate to produce chemiluminescence that can be measured using a chemiluminescence reader. The chemiluminescence signal is proportional to the binding of FcRn to Fc (IgG1).