Response to heparin (IMAGE) Florida Museum of Natural History Caption The iridescent bands on the underside of Atala wings transformed and faded with increased exposure to heparin. Credit Photo by Sourakov et al., 2022 Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.