Non-infectious form of prion protein could cause brain degeneration.Heidi LedfordPrion proteins may react with amyloid-β peptides inside the brain cells of Alzheimer's patients.Thomas Deerinck NCMIR/Science Photo LibraryNon-infectious prion proteins found in the brain may contribute to Alzheimer's disease, researchers have found. The surprising new results, reported this week in Nature1, show that normal prion proteins produced naturally in the brain interact with the amyloid-β peptides that are