(IMAGE) Johannes Gutenberg Universitaet Mainz Caption Sketch of a cell with a primary cilium together with an image of a primary cilium taken using a microscope (top left) Credit ill./photo/©: Helen May-Simera and Viola Kretschmer Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.