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