Researchers (IMAGE) McMaster University Caption Rashik Ahmed, lead author and PhD candidate in the Department of Biochemistry and Biomedical Sciences and Giuseppe Melacini, senior author and a professor in the Departments of Chemistry and Chemical Biology Credit Georgia Kirkos, McMaster University 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.