RT Journal Article SR Electronic T1 Use of acetylcholine mustard to study allosteric interactions at the M2 muscarinic receptor JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/jpet.108.141234 A1 Hinako Suga A1 Katherine W. Figueroa A1 Frederick J. Ehlert YR 2008 UL http://jpet.aspetjournals.org/content/early/2008/08/05/jpet.108.141234.abstract AB