PRC2 Complex in 3-D (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption The PRC2-AEBP2 complex consists of four different lobes of about 55 Å in diameter (A, B, C, D) interconnected by two narrow arms (Arm1, Arm2). Two activity-controlling elements of PRC2 are shown in blue and located at opposite ends. Credit Image courtesy of Eva Nogales. 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.