Functional Assays

The Spike S1 RBD (B.1.1.529 BA.1, Omicron Variant) (SARS-CoV-2): ACE2 Inhibitor Screening Chemiluminescence Assay Kit is designed for screening and profiling neutralizing antibodies or inhibitors of the interaction between the Omicron variant SARS-CoV-2 Spike RBD and human ACE2. This kit comes in a convenient 96-well format, with Biotinylated-ACE2, purified Spike RBD (Omicron Variant; B.1.1.529 BA.1) protein, Streptavidin-HRP, and assay buffers for 100 reactions.  The assay requires only a few steps. First, SARS-CoV-2 Spike RBD (Omicron Variant; B.1.1.529 BA.1) is coated on a 96-well plate overnight. After washing and blocking, the protein is pre-incubated with an inhibitor or neutralizing antibody. Upon subsequent incubation with Biotin-ACE2, the plate is treated with Streptavidin-HRP followed by addition of a chemiluminescence HRP substrate to produce the luminescence signal.

The Spike S1 (B.1.1.529 BA.1, Omicron Variant) (SARS-CoV-2): ACE2 TR-FRET Assay is designed to measure the inhibition of the binding between SARS-CoV-2 Spike S1 (B.1.1.529 BA.1, Omicron Variant) and human ACE2 in a homogeneous 384 reaction format. This TR-FRET-based assay requires no time-consuming washing steps, making it especially suitable for high throughput screening applications. The assay procedure is straightforward and simple; the test inhibitor compound is incubated with biotinylated Spike S1, Eu-labeled ACE2, and the dye-labeled acceptor for one hour. Then the TR-FRET signal is measured using a fluorescence reader capable of measuring Time Resolved-Fluorescence Resonance Energy Transfer (TR-FRET).

The ULK1 Kinase Assay Kit is designed to measure ULK1 activity for screening and profiling applications, using Kinase-Glo® MAX as a detection reagent.

The Spike Trimer (S1+S2) (B.1.1.529 BA.1, Omicron Variant) (SARS-CoV-2): ACE2 Inhibitor Screening Colorimetric Assay Kit is designed for screening and profiling inhibitors or neutralizing antibodies of the interaction between the SARS-CoV-2 Omicron variant Spike Trimer and human ACE2. This kit comes in a convenient 96-well format, with Biotinylated-ACE2, purified Spike Trimer (B.1.1.529 BA.1, Omicron Variant) protein (His-tagged), Streptavidin-HRP, and assay buffers for 100 reactions. The SARS-CoV-2 Spike Trimer, included in the kit, provides a biologically relevant model for the investigation of SARS-CoV-2/host cell interaction. The assay requires only a few steps. First, SARS-CoV-2 Spike Trimer (B.1.1.529 BA.1, Omicron Variant) is coated on a 96-well plate overnight. After washing and blocking, the protein is pre-incubated with an inhibitor or neutralizing antibody. Upon subsequent incubation with Biotin-ACE2, the plate is treated with Streptavidin-HRP followed by addition of a color

The Spike Trimer (S1+S2) (B.1.1.529 BA.1, Omicron Variant) (SARS-CoV-2): ACE2 Inhibitor Screening Chemiluminescence Assay Kit is designed for screening and profiling inhibitors or neutralizing antibodies of the interaction between the SARS-CoV-2 Omicron variant Spike Trimer and human ACE2. The SARS-CoV-2 Spike Trimer, included in the kit, provides a biologically relevant model for the investigation of SARS-CoV-2/host cell interaction. The assay requires only a few steps. First, SARS-CoV-2 Spike Trimer (B.1.1.529 BA.1, Omicron Variant) is coated on a 96-well plate overnight. After washing and blocking, the protein is pre-incubated with an inhibitor or neutralizing antibody. Upon subsequent incubation with Biotin-ACE2, the plate is treated with Streptavidin-HRP followed by addition of chemiluminescence HRP substrate to produce the luminescence signal.

The TNIK Kinase Assay Kit is designed to measure TNIK kinase activity for screening and profiling applications using Kinase-Glo^® MAX as a detection reagent. 

The PARP12 Chemiluminescent Assay Kit is designed to measure PARP12 activity for screening and profiling applications. PARP12 is known to catalyze the NAD-dependent ADP-ribosylation of histones. The key to the PARP12 Chemiluminescent Assay Kit is the biotinylated NAD+. With this kit, only three simple steps are required for PARP12 reactions. First, histone proteins are coated on a 96-well plate. Next, a biotinylated NAD+ mix (termed PARP Substrate Mixture) is incubated with the PARP12 enzyme in an optimized assay buffer. Finally, 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 IKKβ Kinase Assay Kit is designed to measure the kinase activity of IKKβ for screening and profiling applications using Kinase-Glo^® MAX as a detection reagent. 

The PROTAC Optimization Kit for IRAK4-Cereblon Binding is designed for the testing and profiling of PROTACs directed against IRAK4 and Cereblon (CRBN). The IRAK4 ligand-1 is included as a control that blocks PROTAC binding to IRAK4. With this kit, only three simple steps are required for the measurement of PROTAC activity. First, the PROTAC of interest is incubated with CRBN and IRAK4. Next, acceptor beads are added, then donor beads, followed by reading of the Alpha-counts. Illustration of the assay principle: A PROTAC of interest or positive control IRAK4 Degrader-1 (PROTAC) interacts with both IRAK4 and CRBN, bringing them in close proximity. IRAK4 contains a GST-tag, recognized by the GSH donor bead, while CRBN contains a FLAG-tag that binds to the AlphaLISA™ acceptor bead conjugated with an anti-FLAG antibody. Upon excitation of the donor bead, a singlet oxygen is generated by the donor bead, which excites the acceptor bead and emits light proportionally to the level of interacti