Nicotine Receptor (IMAGE) UT Southwestern Medical Center Caption Three-dimensional structures of nicotinic acetylcholine receptor determined by cryo-EM, courtesy of Hibbs Lab. Credit Hibbs Lab, UT Southwestern Medical Center Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.