RT Journal Article SR Electronic T1 Multiple Transport Systems Mediate the Hepatic Uptake and Biliary Excretion of the Metabolically Stable Opioid Peptide [D-penicillamine2,5]enkephalin JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/dmd.104.001420 A1 Keith A. Hoffmaster A1 Maciej J. Zamek-Gliszczynski A1 Gary M. Pollack A1 Kim L.R. Brouwer YR 2004 UL http://dmd.aspetjournals.org/content/early/2004/11/04/dmd.104.001420.abstract AB