Cells (IMAGE) University of Bonn Caption In mice injected with casein, the structure of myelin loosens. It only loosely covers the axons. Sometimes the insulating layer is even missing altogether. Credit © Group Prof. Kürten/University of Bonn Usage Restrictions Please use this image only in connection with the press release. License Original 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.