The GR-RAR chimera is a powerful tool for discovering novel RAR ligands and analogues. It improves upon standard assays that exclusively measure gene activation potential, as this system visualizes the receptor's subcellular trafficking. This technique offers significant advantages in studies exploring ligand-induced receptor dynamics. 5. Conclusion

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The chimeric receptor is designed to remain in the cytoplasm of untreated cells.

The system can detect physiological concentrations of RAR ligands. 4. Discussion and Implications

The chimera is constructed by fusing the ligand-binding domain of the retinoic acid receptor (RAR) to a reporter sequence that allows tracking (e.g., green fluorescent protein).