Complex Structure (IMAGE) Chinese Academy of Sciences Headquarters Caption The complex structure of the novel σ/anti-σ factor SigI/RsgI is completely different from the known structures of other σ/anti-σ factors Credit FENG Yingang and LIU Yajun 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.