Copper-mediated amyloid-beta toxicity is associated with an intermolecular histidine bridge

David P Smith, Danielle G Smith, Cyril C Curtain, John F Boas, John R Pilbrow, Giuseppe D Ciccotosto, Tong-Lay Lau, Deborah J Tew, Keyla Perez, John D Wade, Ashley I Bush, Simon C Drew, Frances Separovic, Colin L Masters, Roberto Cappai, Kevin J Barnham