Fig. 1 (IMAGE) Osaka University Caption Entire neutron crystal structure of copper amine oxidase. (Left) Neutron crystallography determined the entire protein structure, including the hydrogen atoms. (Right) The precise positions of the hydrogen atoms indicate that the detected molecule is not a product aldehyde but a substrate amine. Maps for the hydrogen atoms (more precisely, deuterium) are presented by using a cyan mesh. Credit Takeshi Murakawa, Toshihide Okajima Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. 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.