Cell-based assays provide one of the most valuable tools in drug discovery. They are routinely used in target validation, HTS campaigns, structure activity relationship analyses and ADMET studies. Many factors need to be considered in designing, developing and running relevant cell based assays to progress discovery programs. Significant advances continue to be made in assay design and cell supply processes that incorporate biologically relevant cell types and novel detection technologies. This symposium is designed to capture successful techniques and practices that enable high quality cell-based assays using commonly employed cell types such as CHO, HEK and U-2 OS, as well as the expanding application of additional cell types. The symposium will be of great interest to cell culture scientists, assay developers, screeners, medicinal chemists, ADMET and therapeutic teams.