CAROL AND MIKE WERNER / SCIENCE PHOTO LIBRARY CAROL AND MIKE WERNER / SCIENCE PHOTO LIBRARY
Normal microtubules are shown on the left and disintegrating microtubules on the right. The tau proteins binding the microtubules break down and form tangled masses which are thought to contribute to Alzheimer's disease and possibly chronic traumatic encephalopathy (CTE) in football players and war veterans.
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