Alpha-synuclein Fibrils (IMAGE) ETH Zurich Caption Alpha-synuclein fibrils. Shown here in an electron microscope image are fibrils produced in the laboratory for research purposes. The diameter of the fibrils is about 10 nanometres - 5000 times less than that of a human hair. Credit ETH Zurich / Juan Gerez 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.