The PARP1 Chemiluminescent Activity Assay kit is designed to measure PARP1 activity for screening and profiling applications. The key to the PARP1 Chemiluminescent Activity Assay is the biotinylated substrate. With this kit, only three simple steps are required for PARP1 reactions. First, histone proteins are coated on a 96-well plate. Next, the PARP1 biotinylated substrate is incubated with the assay buffer that contains the PARP1 enzyme. Finally, the plate is treated with streptavidin-HRP followed by addition of the HRP substrate to produce a chemiluminescence that can then be measured using a chemiluminescence reader.