Crystal Structure of SRP Forms (IMAGE) Umea University Caption Detail of a crystal structure of unbound (right) and signal-sequence bound SRP forms (left, signal sequence depicted in red). Credit Courtesy of Umeå University Usage Restrictions This picture may only be used in texts based on this press release. 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.