Jianping Xu (IMAGE) McMaster University Caption Jianping Xu, a lead author on the paper and a professor in the Department of Biology at McMaster University. Credit McMaster University Usage Restrictions Editorial use only License Original 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.