Bacterial ribosome (IMAGE) Charité - Universitätsmedizin Berlin Caption 3D reconstructions showing the precursors of the large bacterial ribosomal subunit and the bound helper proteins. Credit Nikolay/Charité. 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.