Nathan Bullen and Jon Whitney (IMAGE) McMaster University Caption Nathan Bullen (left) and John Whitney (right) examine crystals of the purified toxin, which they used to solve its 3-dimensional structure through X-ray crystallography. Credit Blake Dillon, McMaster University Usage Restrictions To be used when reporting on this research 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.