The PAK1 Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor PAK1 protein expression profile in cells. The kit can be used for measuring the relative amounts of PAK1 in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on PAK1. Species Reactivity: human, mouse, rat. Range: > 5000 Cells. Sensitivity: >5000 cells