The Nuclear Receptor NR4A1 Colorimetric Cell-Based ELISA Kit provides a lysate-free, convenient, and high-throughput approach for sensitive detection of NuclearReceptorNR4A1 protein expression profile in cells. The kit can be used for measuring the relative amounts of NuclearReceptorNR4A1 in cultured cells as well as screening for the effects that various treatments, inhibitors (ie siRNA or chemicals), or activators have on NuclearReceptorNR4A1.