The NF-kappaB p105/p50 (Phospho-Ser927) Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor NF-kappaB p105/p50 (Phospho-Ser927) protein expression profile in cells. The kit can be used for measuring the relative amounts of NF-kappaB p105/p50 (Phospho-Ser927) in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on NF-kappaB p105/p50 (Phospho-Ser927). Species Reactivity: human, mouse. Range: > 5000 Cells. Sensitivity: >5000 cells