The Connexin 43 Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can monitor Connexin 43 protein expression profile in cells. The kit can be used for measuring the relative amounts of Connexin 43 in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on Connexin 43.