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.

Image Credit: J. Paul Taylor, MD, PhD, University of Pennsylvania School of Medicine

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