The PathHunter eXpress ErbB2-ErbB3 Functional Assay provides an easy-to-use cell based assay to study drug candidates (small molecules or biologics) targeting RTKs. This kit assesses RTK activation via detection of activated ErbB2 and ErbB3 dimerization-induced SH2 domain protein recruitment. This product uses EFC technology. The included cell line overexpresses ProLink-tagged ErbB2 and an EA-tagged SH2 domain protein. It also overexpresses an untagged coreceptor, ErbB3 Upon ligand-induced receptor activation, SH2-EA recruitment leads to production of EFC signal. eXpress kits are a convenient, ready-to-use format which contains all materials needed to run the assay, including single-use vials of cryopreserved cells, cell plating media, detection reagent, and assay plates. For detailed product information, User Manual and Datasheet, visit www.discoverx.com/express.