Transmembrane helices 1 and 6 of the human breast cancer resistance protein (BCRP/ABCG2): identification of polar residues important for drug transport

Z Ni, Z Bikadi, X Cai, M. F Rosenberg and Q. Mao

The American Journal of Physiology - Cell Physiology 299 ( 5 ): 1100 - 1109 , 2010