Cell’s Protein Recycling Systems Linked (IMAGE) University of Pennsylvania School of Medicine Caption Neurodegeneration in a fruit fly eye. Normal or wild type eye (left) appears uniformly structured. Eye in fruit fly model of Alzheimer's disease (middle) appears rough and deformed. Eye in fruit fly model of Alzheimer's disease in which extra HDAC6 protein is expressed (right) appears uniformly structured as in wild type. Credit J. Paul Taylor, MD, PhD, University of Pennsylvania School of Medicine 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.