Human thyroid receptor forms tetramers in solution, which dissociate into dimers upon ligand binding - Figueira, Ana C. M.; Dias, Sandra M. G.; Santos, Maria A. M.; Apriletti, James W.; Baxter, John D.; Webb, Paul; Neves, Francisco A. R.; Simeoni, Luiz A.; Ribeiro, Ralff C. J.; Polikarpov, Igor (Cell Biochemistry and Biophysics, 2006)