TY - JOUR T1 - Regulation of Opioid Receptor Function by Chronic Agonist Exposure: Constitutive Activity and Desensitization JF - Molecular Pharmacology JO - Mol Pharmacol SP - 20 LP - 25 DO - 10.1124/mol.60.1.20 VL - 60 IS - 1 AU - Charles Chavkin AU - Jay P. McLaughlin AU - Jeremy P. Celver Y1 - 2001/07/01 UR - http://molpharm.aspetjournals.org/content/60/1/20.abstract N2 - ER -