The p27 Kip1 Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor p27 Kip1 protein expression profile in cells. The kit can be used for measuring the relative amounts of p27 Kip1 in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on p27 Kip1. Range: > 5000 Cells. Sensitivity: >5000 cells