The HNF4 alpha Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor HNF4 alpha protein expression profile in cells. The kit can be used for measuring the relative amounts of HNF4 alpha in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on HNF4 alpha.