Different TBP-associated factors are required for mediating the stimulation of transcription in vitro by the acidic transactivator GAL- VP16 and the two nonacidic activation functions of the estrogen receptor. - Christel Brou; Jun Wu; Simak Ali; Elisabeth Scheer; Cathy Lang; Irwin Davidson; Pierre Chambon; Laszlo Tora (Nucleic Acids Res., 1993)