Nur77 is a member of the steroid/thyroid hormone phosphoprotein receptor superfamily. It is heavily post-translationally modified and rapidly induced in response to androgens and growth factors. It governs fundamental processes such as cell proliferation, differentiation, and apoptosis. For some time, it was classified as an orphan receptor with no identifiable or known ligand, but scientists finally were able to identify a novel class of methylene-substituted diindolylmethanes (C-DIM) as its endogenous ligand.