The workcells in this new category are being designed to allow researchers in the drug discovery field to run a wide range of useful assays that are typically used in high-throughput screens. The various options available in the VaryScreen series support many cell-based, receptor-based and enzyme-based assays using common detection methods, such as fluorescence energy transfer, reporter gene luminescence, enzyme-linked immunoabsorption, and UV-Visibile light absorption. With the accompanying SoftLinx control software, it is possible to design complex assays with flow schemes that can vary as the nature of the results are obtained and examined interactively.