X-ray Crystallography Image of TfR1 (IMAGE) Boston Children's Hospital Caption The TfR1 receptor, whose three-dimensional structure was determined in 1999, not only serves as an entry portal for New World arenaviruses, but plays a key role in transporting iron into cells. Credit Courtesy Stephen Harrison, PhD, Children's Hospital Boston and Howard Hughes Medical Institute Usage Restrictions Please credit as indicated. 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.