The Histone H2A.X Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor Histone H2A.X protein expression profile in cells. The kit can be used for measuring the relative amounts of Histone H2A.X in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on Histone H2A.X. Range: > 5000 Cells. Sensitivity: >5000 cells