Rendering (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This rendering shows the structure of how actinium (magenta) binds with other molecules. Red triangles point out how the arrangement differs from actinium’s lighter counterpart, lanthanum (grey). The stick structure of the binding molecule (the ligand) is surrounded by pockets in the protein. Credit Jen Wacker/Berkeley Lab Usage Restrictions N/A License Original 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.