The Arrestin 1 (Phospho-Ser412) Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor Arrestin 1 (Phospho-Ser412) protein expression profile in cells. The kit can be used for measuring the relative amounts of Arrestin 1 (Phospho-Ser412) in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on Arrestin 1 (Phospho-Ser412). Range: > 5000 Cells. Sensitivity: >5000 cells