The SP1 Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor SP1 protein expression profile in cells. The kit can be used for measuring the relative amounts of SP1 in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on SP1. Species Reactivity: human, mouse, rat. Range: > 5000 Cells. Sensitivity: >5000 cells