The RARγ Reporter Cellular Assay Pack provides all the key reagents required to monitor the activity of retinoic acid receptor gamma (RARγ). The pack contains the RARγ Reporter (Luc)-HEK293 Cell Line, a luciferase reporter cell line that contains a firefly luciferase gene under the control of retinoic acid response elements stably integrated into HEK293 cells along with full length human RARα (GenBank Accession No. P13631-1). This cell line is functionally validated for the response to the stimulation of all-trans retinoic acid, and the expression of RARγ is confirmed by Western blotting._x000D_Additionally, the pack includes cell culture medium (Thaw Medium 6) that has been optimized for use with HEK293 cells. Thaw Medium 6 includes 10% fetal bovine serum and 1% Pen/Strep. Finally, the pack provides the ONE-Step™ Luciferase Detection System. This reagent provides highly sensitive, stable detection of firefly (Photinus pyralis) luciferase activity. The ONE-Step luciferase reagent can be used directly in cells in growth medium, and can be detected with any luminometer; automated injectors are not required.