Mapping Mutations (IMAGE) Rockefeller University Caption Researchers pinpointed the locations on the blood platelet receptor proteins affected by DNA variations that alter the receptor's amino acid building blocks, including those associated with the bleeding disorder Glanzmann thrombasthenia (green circles), those newly identified in the study (grey), and with other conditions (orange and magenta). Credit Laboratory of Blood and Vascular Biology at The Rockefeller University/<i>Proceedings of the National Academy of Sciences</i> Usage Restrictions Image may be used only to illustrate the research described in the accompanying story. 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.