Analyzing a Protein's Footprint (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Results from X-ray footprinting mass spectrometry (XFMS) experiments at Berkeley Lab's Advanced Light Source, mapped out on these 3-D structural renderings of the protein, helped researchers identify where the protein binds with a mineral. The red areas indicate possible binding areas. Credit Berkeley Lab 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.