The 3D Reconstruction of a Pilus (image) Okinawa Institute of Science and Technology (OIST) Graduate University Share Print E-Mail Caption The cryo-EM reconstruction shows how individual pilin protein units extend a part of their structure (the donor strand) to connect to each other and form a stable pilus filament. An individual pilin protein unit is shown on the right. Credit H. Matsunami and S. Shibata, OIST Usage Restrictions Credit given Share Print E-Mail 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.