Fruit Fly Heart (IMAGE) Johns Hopkins Medicine Caption This is an image of a normal fruit fly heart (strip of muscle running from the upper left to the bottom right). The muscle protein is labeled with a fluorescent tag. Credit Cammarato laboratory 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.