C. elegans and melatonin (IMAGE) University of Connecticut Caption The Caennorhabditis elegans worm's neurons expressing the receptor for melatonin glow green. Credit Bojun Chen/UConn Health Usage Restrictions Only with proper credit. 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.