PathHunter® eXpress Dimerization Assay Kits provide a robust, highly sensitive and easy-to-use, cell-based functional assay to study receptor-receptor interactions at the cell surface. The eXpress kits contain all the reagents needed for a complete assay including cells, flash detection reagents, cell plating reagents, and plates. The pre-validated, frozen eXpress cells have been manufactured for short term use and are provided in a ready-to-assay format that saves time and adds convenience. Assays have been designed for 96-well and 384-well plate formats.