Fruit Flies (IMAGE) Johns Hopkins Medicine Caption Fruit fly flight muscles remain intact when they have a normal actin protein (left), but when the flight muscles have a hypertrophic cardiomyopathy mutation in the actin, the tensed muscles shred when the fruit flies attempt flight. Credit Cammarato Lab 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.