RT Journal Article SR Electronic T1 Key differences in molecular complexes of the cholecystokinin receptor with structurally-related peptide agonist, partial agonist, and antagonist. Focus on importance of sulfation of tyrosine in peptide position 27 JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/mol.104.001396 A1 Sonnet J.H. Arlander A1 Maoqing Dong A1 Xi-Qin Ding A1 Delia I. Pinon A1 Laurence J. Miller YR 2004 UL http://molpharm.aspetjournals.org/content/early/2004/06/02/mol.104.001396.abstract AB