Signaling pathways activated by the phytochemical nordihydroguaiaretic acid contribute to a Keap1-independent regulation of Nrf2 stability: Role of glycogen synthase kinase-3 - Rojo AI; Medina-Campos ON; Rada P; Zúñiga-Toalá A; López-Gazcón A; Espada S; Pedraza-Chaverri J; Cuadrado A (Free Radical Biology And Medicine, 2012)