Fetal and adult muscle receptors (IMAGE) University of California - San Diego Caption In a serendipitous discovery, UC San Diego researchers using cryo-EM technology captured the first visualizations of the 3-D structure of the muscle acetylcholine receptor in fetal and adult muscles. Credit Hibbs Lab, UC San Diego Usage Restrictions Must be used in conjunction with Nature study on muscle receptors License Original 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.