Guiding an Enzyme's Scissors (IMAGE) University of British Columbia Caption How one amino acid can spell the difference between a healthy aging brain and early onset Alzheimer's disease Credit Brian Kladko and Weihong Song/University of British Columbia 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.