The Claudin 11 Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor Claudin 11 protein expression profile in cells. The kit can be used for measuring the relative amounts of Claudin 11 in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on Claudin 11.