3D Structure of the Protein Complex (IMAGE) Charité - Universitätsmedizin Berlin Caption 3D structure of the complex consisting of the bacterial RNA polymerase (light and dark gray) and the viral λN protein (red). The lower end of the λN reaches inside the RNA polymerase, linking its two halves. At its upper end, the λN protein is in contact with RNA (orange) and various regulatory proteins (yellow, blue and green). Credit © Krupp/Charité Usage Restrictions This image may only be used with appropriate caption or credit. 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.