Differential expression and stability of endogenous nuclear factor E2-related factor 2 (Nrf2) by natural chemopreventive compounds in HepG2 human hepatoma cells - Jeong, W S; Keum, Y S; Chen, C; Jain, M R; Shen, G; Kim, J H; Li, W; Kong, A N (J Biochem Mol Biol, 2005)