RT Journal Article SR Electronic T1 α4β2 nicotinic receptors with high and low acetylcholine sensitivity: pharmacology, stoichiometry and sensitivity to chronic exposure to nicotine JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/mol.106.023044 A1 Mirko Moroni A1 Ruud Zwart A1 Emanuele Sher A1 Bruce K Cassels A1 Isabel Bermudez YR 2006 UL http://molpharm.aspetjournals.org/content/early/2006/05/23/mol.106.023044.abstract AB