Challenges Predicting Ligand-Receptor Interactions of Promiscuous Proteins: The Nuclear Receptor PXR. - Sean Ekins; Sandhya Kortagere; Manisha Iyer; Erica J. Reschly; Markus A. Lill; Matthew R. Redinbo; Matthew D. Krasowski (PLoS Comput. Biol., 2009)