TRAPped Together (IMAGE) DOE/Pacific Northwest National Laboratory Caption TRAP (in green, orange and yellow) binds to a tag on known protein (#2). Light crosslinks TRAP's benzophenone to mystery protein (#1). Subsequent biochemical analysis reveals clues to unknown protein (#1). Credit Uljana Mayer/PNNL Usage Restrictions Credit Uljana Mayer/PNNL 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.