Fly Polytene Chromosomes with Ataxin-7 (IMAGE) Stowers Institute for Medical Research Caption Ataxin-7, one of several genes associated with neurodegenerative disease, anchors a key enzymatic module to the fruit fly SAGA complex, which helps control gene activity in organisms from yeast to humans. Fly polytene chromosome preparation with Ataxin-7 is shown in green, RNA polymerase in red and DNA in blue. Credit Image courtesy of Dr. Ryan Mohan of Stowers Institute for Medical Research 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.