Drosophila (IMAGE) PLOS Caption The locomotor ability of flies expressing the pathogenic Aβ peptide variant, which is associated with Alzheimer disease, is severely compromised compared with that of flies carrying less-harmful Aβ peptide variants. Credit Crowther et al. Usage Restrictions Please cite the authors and PLoS Biology as the source. 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.