The CD3 zeta Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor CD3 zeta protein expression profile in cells. The kit can be used for measuring the relative amounts of CD3 zeta in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on CD3 zeta. Species Reactivity: human, mouse, rat. Range: > 5000 Cells. Sensitivity: >5000 cells