Proteasome Regulatory Particle (image) DOE/Lawrence Berkeley National Laboratory Share Print E-Mail Caption Berkeley researchers have provided the most detailed look ever at the "regulatory particle" used by proteasomes to identify and degrade proteins that have been marked for destruction. The particle is organized into two sub-complexes, a "lid" and a "base." Credit Berkeley Lab and UC Berkeley Usage Restrictions None 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.