Tasting Sour (IMAGE) Monell Chemical Senses Center Caption Fly taste receptor neurons (green) responsible for detecting acids in the food environment. Credit Yali Zhang, Monell Chemical Senses 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.